A linguistic database is a collection of texts where sentences and words are annotated with linguistic information, such as part of speech, morphology, and syntactic sentence structure. While early linguistic databases focused on word annotations, and later also on parse-trees of sentences (so-called treebanks), the recent years have seen a growing interest in richly annotated corpora of histor...

Building treebanks is a prerequisite for various experiments and research tasks in the area of NLP. Under a recently awarded grant, we are developing (i) a formal definition of a (dependency based) tree, and (ii) a midsize treebank based on this definition. The annotated corpus is designed to have three layers: morphosyntactic (linear) tagging, syntactic dependency annotation, and the tectogram...

Feature structures are partially speciied, record-like structures which are employed in many recent grammar formalisms to represent linguistic objects of various kinds. Building on previous approaches to the logical representation of linguistic knowledge, this paper presents a logical language which is suuciently expressive to allow for the encoding of recursive constraints on feature structure...

This study entails the understanding of and the development of a computational method for automatically extracting complex expressions in language that correspond to event to event sequential relations in the real world. We here develop component procedures of a system that would be capable of taking raw linguistic input (such as those from narrative writings or social network data), and find r...