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Research Interests Probabilistic and Symbolic NLP, POS Tagging, Parsing, Finite-State Tools, Computational Morphology, Statistical Machine Translation Software TreeTagger a tool for automatic annotation of text corpora with part-of-speech and lemma information (POS tagger and lemmatizer) RFTagger a POS tagger for fine-grained POS tagsets. SFST a toolbox for the implementation of morphological analysers and other programs which are based on finite state transducers. SMOR a German finite-state morphology implemented in the SFST programming language. BitPar an efficient parser for Treebank grammars. LoPar a parser for head-lexicalized probabilistic context-free grammars. VPF a graphical viewer for parse trees and parse forests including parses with feature structures. LSC a statistical clustering software for predicate-argument tuples with a fixed number of arguments. PAC a statistical clustering software for predicate-argument tuples with a variable number of arguments. The selectional preferences are generalized by means of a WordNet hierarchy.