Diachronic Trends in Word Order Freedom and Dependency Length in Dependency-Annotated Corpora of Latin and Ancient Greek Kristina Gulordava Paola Merlo University of Geneva University of Geneva
[email protected] [email protected] Abstract word order; we need languages that exhibit gen- uine optionality of word order, and for which large One easily observable aspect of language amounts of text have been carefully annotated in variation is the order of words. In human the chosen representation. and machine natural language process- ing, it is often claimed that parsing free- In the current choice of hand-annotated tree- order languages is more difficult than pars- banks, these requirements are fullfilled by ing fixed-order languages. In this study dependency-annotated corpora of Latin and An- on Latin and Ancient Greek, two well- cient Greek. These two languages are exten- known and well-documented free-order sively documented, they are dead languages and languages, we propose syntactic correlates are therefore studied in a tradition where careful of word order freedom. We apply our text editing and curation is a necessity, and have indicators to a collection of dependency- the added advantage that their genealogical chil- annotated texts of different time peri- dren, Romance languages and Modern Greek, are ods. On the one hand, we confirm a also grammatically well studied, so that we can trend towards more fixed-order patterns in add a diachronic dimension to our observations. time. On the other hand, we show that Both Latin and Ancient Greek allow a lot of a dependency-based measure of the flex- freedom in the linearisation of sentence elements.