“Towards concept-based and cross-language search”, LORIA, Nancy, February, 2009 Slides

“Natural Language and the Semantic Web: a crucial symbiosis”, Semantic Web Summer School, Cercedilla, Madrid, July, 2009 Slides

“�ber die Rolle von Weltwissen in der Maschinellen Sprachverarbeitung - Und dar�ber wie es aus Texten gelernt werden kann (On the Role of World Knowledge in Natural Language Processing - And about how it can be Acquired from Texts)”, Institute f�r Maschinelle Sprachverarbeitung (IMS), University of Stuttgart, January, 2008 Slides

“Computerlinguistische Werkzeuge zur Abfrage und Strukturierung von Wissen - Eine Anwendungsorientierte Perspektive� (Natural Language Processing Tools for the Purpose of Querying and Structuring Knowledge - A Practical Perspective)”, University of Hildesheim, March, 2008 Slides

“Ontology Learning: What have we been doing?”, Conference on Text-Technological-Processing, Zentrum f�r interdisziplin�re Forschung (ZiF), March, 2008 Slides

“Invited talk on Learning Qualia Structures from the Web�”, Language and Communication Technologies Colloquia, Free University of Bolzano, April, 2008 Slides

“�ber die Extraktion von Weltwissen aus grossen Korpora: alles nur Fiktion? (On Extracting World Knowledge from Large Corpora: just fiction?)”, University of Heidelberg, April, 2008 Slides

“Cross-media and Web-based Information Extraction”, MODUL University Vienna, Mai, 2008

“Invited talk ``Cross-media and Web-based Information Extraction�”, KR Seminar Series, University of Oxford, Mai, 2008 Slides

“Invited talk ``Ontology-based Natural Language Understanding for Question Answering: Richard Montague meets Tom Gruber�”, Information Systems Department, University of Oxford, Mai, 2008 Slides

“Enriching Wikipedia with new Cross-language Links”, OntoLex Workshop, collocated with LREC 2008, July, 2008 Slides

“Ontologies for Text Mining for Biomedicine”, Workshop on ontologies at Boehringer Ingelheim, Biberach an der Riss, Mai, 2007

“Invited talk On the relation between ontology learning, engineering, evolution and expressivity”, Conference Terminologie et Intelligence Artificielle (TIA), Sophia Antipolis, October, 2007 Slides

“Invited 1-day course lecture on ontology learning”, HCI Postgraduate School, Aalborg, Denmark, Mai, 2006

“Invited course on Text Analysis and Ontologies”, Summer School on Multimedia Semantics (SSMS) - Analysis, Annotation, Retrieval and Applications, Chalkidiki, Greece, Septenmber, 2006

“Invited talk on Ontology Learning and Evolution”, Workshop on Ontology Evolution and Multimedia Information Extraction (BOEMIE) held in conjunction with EKAW, Prague, October, 2006 Slides

“Invited talk on Ontology Learning from Text in a Nutshell”, European Media Lab (EML), Heidelberg, December, 2006

“Invited Panelist on ``Semantic Technologies and their Applications�”, International Conference on Natural Language and Information Systems (NLDB), June, 2006