Active Dual Supervision: Reducing the Cost of Annotating Examples and Features Prem Melville author Vikas Sindhwani author 2009-06 text Proceedings of the NAACL HLT 2009 Workshop on Active Learning for Natural Language Processing Eric Ringger editor Robbie Haertel editor Katrin Tomanek editor Association for Computational Linguistics Boulder, Colorado conference publication melville-sindhwani-2009-active https://aclanthology.org/W09-1907/ 2009-06 49 57