43rd International ACM SIGIR Conference on Research and Development in Information Retrieval 43rd International ACM SIGIR Conference on Research and Develop in Information Retrieval SIGIR 2020 Table of Contents SIGIR’20 Chairs’ Welcome........................................................................................................................ 3 SIGIR’20 Conference Organization ........................................................................................................... 5 SIGIR’20 Program at a Glance .................................................................................................................. 7 SIGIR’20 Keynote Talks ............................................................................................................................ 8 The Next Generation of Neural Networks ............................................................................................ 8 On Presuppositions of Machine Learning: A Meta Theory .................................................................... 9 Coopetition in IR Research ................................................................................................................. 11 Proof by Experimentation? Towards Better IR Research..................................................................... 12 From Information to Assistance ......................................................................................................... 14 How Deep Learning Works for Information Retrieval ......................................................................... 15 Industry Track Invited Talks ................................................................................................................... 16 Large-scale Multi-modal Search and QA at Alibaba ............................................................................ 16 The New TREC Track on Podcast Search and Summarization .............................................................. 17 SIGIR’20 Main Conference Program ....................................................................................................... 18 Monday, July 27, 2020 ....................................................................................................................... 18 Tuesday, July 28, 2020 ....................................................................................................................... 23 Wednesday, July 29, 2020 .................................................................................................................. 28 SIGIR’20 Short/Demo/TOIS Paper Session I ............................................................................................ 32 Short Paper Session I ......................................................................................................................... 32 Demonstration Paper Session I .......................................................................................................... 35 TOIS Paper Session I........................................................................................................................... 36 SIGIR’20 Short/Demo/TOIS Paper Session II ........................................................................................... 38 Short Paper Session II ........................................................................................................................ 38 Demonstration Paper Session II ......................................................................................................... 41 TOIS Paper Session II .......................................................................................................................... 42 SIGIR’20 Summer School ....................................................................................................................... 44 Personalized Search ........................................................................................................................... 44 Natural Language Processing and Information Retrieval: Together at Last ......................................... 45 Recent Advances in Language Model Pre-training .............................................................................. 46 Offline Evaluation of IR systems ......................................................................................................... 47 Information Retrieval as Interaction .................................................................................................. 48 Music recommendations (research) at Spotify ................................................................................... 49 SIGIR’20 Social Event ............................................................................................................................. 50 SIGIR’20 DC Student Talk Session ........................................................................................................... 51 SIGIR’20 Tutorials and Workshops at a Glance ....................................................................................... 52 SIGIR’20 Tutorials .................................................................................................................................. 53 Tutorial 1: Conversational Recommendation: Formulation, Methods, and Evaluation ........................ 53 Tutorial 2: Mining the Web for Cross-lingual Parallel Data ................................................................. 54 Tutorial 3: Tutorial on Task-Based Search and Assistance ................................................................... 55 Tutorial 4: Recent Advances in Conversational Information Retrieval ................................................. 56 43rd International ACM SIGIR Conference on Research and Develop in Information Retrieval Page 1 43rd International ACM SIGIR Conference on Research and Develop in Information Retrieval SIGIR 2020 Tutorial 5: Reciprocal Recommendation: matching users with the right users .................................... 57 Tutorial 6: Question Answering over Curated and Open Web Sources ............................................... 58 Tutorial 7: Modeling User Behavior for Vertical Search: Images, Apps and Products .......................... 59 Tutorial 8: Interactive Information Retrieval: Models, Algorithms, and Evaluation ............................. 60 Workshop Programs .............................................................................................................................. 61 The SIGIR 2020 Workshop on Applied Interactive Information Systems (AIIS 2020) ............................ 61 The First Workshop on Information Retrieval in Finance (FinIR 2020) ................................................. 62 BIRDS - Bridging the Gap between Information Science, Information Retrieval and Data Science (BIRDS 2020) ................................................................................................................................................. 63 The 2020 SIGIR Workshop on eCommerce (eCom’20) ........................................................................ 65 The SIGIR 2020 Workshop on Deep Natural Language Processing for Search and Recommendation (DeepNLP) ......................................................................................................................................... 67 The 1st International Workshop on Legal Intelligence (LegalAI 2020) .................................................. 69 SIGIR’20 Workshop on Deep Reinforcement Learning for Information Retrieval (DRL4IR) .................. 70 The 3rd International Workshop on ExplainAble Recommendation and Search (EARS 2020) ............... 71 43rd International ACM SIGIR Conference on Research and Develop in Information Retrieval Page 2 43rd International ACM SIGIR Conference on Research and Develop in Information Retrieval SIGIR 2020 SIGIR’20 Chairs’ Welcome Welcome to the 43rd Annual International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR 2020). SIGIR is the premier scientific conference in the broad area of information retrieval. According to the original plan, SIGIR 2020 would be held at Hyatt Regency in Xi'an, China. Xi’an, known by most people as home to Terracotta Army of Emperor Qin, is one of the oldest cities in China. The beautiful Hyatt hotel was also carefully chosen after we had site visits for more than 15 local hotels and done frequent communications with experts and professionals across academia, government and industry. Due to the pandemic of COVID-19, the organizing committee of SIGIR 2020 decided to move this year’s SIGIR fully online in April. Thus, our conference this year becomes the first virtual one in SIGIR history. This last-minute change of the conference posed many challenges and much burden in terms of preparation and sponsorships. Despite the shortened time period and challenges, General Chairs, Vice Chair and their local organizing team worked very diligently to carefully prepare an outstanding program for everyone. This year SIGIR has received a record high number of submissions in its history, as shown in the following statistics. This trend suggests a renewed interest in our field. We were happy to observe the highest number of submissions for long, short, industry track and demo papers, which sums up to 1,180 papers. The accepted papers were made by 1,221 authors from 32 countries. • 555 and 507 valid submissions for full and short papers respectively • 80 effective submissions for industry track papers plus 38 demo papers