Lukas Michelbacher


A Cascaded Classification Approach to Semantic Head Recognition
Lukas Michelbacher | Alok Kothari | Martin Forst | Christina Lioma | Hinrich Schütze
Proceedings of the 2011 Conference on Empirical Methods in Natural Language Processing


A Linguistically Grounded Graph Model for Bilingual Lexicon Extraction
Florian Laws | Lukas Michelbacher | Beate Dorow | Christian Scheible | Ulrich Heid | Hinrich Schütze
Coling 2010: Posters

Sentiment Translation through Multi-Edge Graphs
Christian Scheible | Florian Laws | Lukas Michelbacher | Hinrich Schütze
Coling 2010: Posters

Building a Cross-lingual Relatedness Thesaurus using a Graph Similarity Measure
Lukas Michelbacher | Florian Laws | Beate Dorow | Ulrich Heid | Hinrich Schütze
Proceedings of the Seventh International Conference on Language Resources and Evaluation (LREC'10)

The Internet is an ever growing source of information stored in documents of different languages. Hence, cross-lingual resources are needed for more and more NLP applications. This paper presents (i) a graph-based method for creating one such resource and (ii) a resource created using the method, a cross-lingual relatedness thesaurus. Given a word in one language, the thesaurus suggests words in a second language that are semantically related. The method requires two monolingual corpora and a basic dictionary. Our general approach is to build two monolingual word graphs, with nodes representing words and edges representing linguistic relations between words. A bilingual dictionary containing basic vocabulary provides seed translations relating nodes from both graphs. We then use an inter-graph node-similarity algorithm to discover related words. Evaluation with three human judges revealed that 49% of the English and 57% of the German words discovered by our method are semantically related to the target words. We publish two resources in conjunction with this paper. First, noun coordinations extracted from the German and English Wikipedias. Second, the cross-lingual relatedness thesaurus which can be used in experiments involving interactive cross-lingual query expansion.


A Graph-Theoretic Algorithm for Automatic Extension of Translation Lexicons
Beate Dorow | Florian Laws | Lukas Michelbacher | Christian Scheible | Jason Utt
Proceedings of the Workshop on Geometrical Models of Natural Language Semantics