Finin, Tim ; Murnane, Will ; Karandikar, Anand ; Keller, Nicholas ; Martineau, Justin ; Dredze, Mark: Annotating named entities in Twitter data with crowdsourcing. In: Proceedings of the NAACL HLT 2010 Workshop on Creating Speech and Language Data with Amazon's Mechanical Turk. Stroudsburg, PA, USA : Association for Computational Linguistics, 2010, S. 80--88