@unpublished{princeton2015,
 author = {J. M. Siskind},
 title = {Seeing, Saying, Doing, and Learning: Integrating Computer
Vision, Natural Language Processing, Robotics, and Machine Learning
Through Multidirectional Inference},
 location = {Princeton University},
 date = 15,
 month = oct,
 year = 2015,
 url = {http://engineering.purdue.edu/~qobi/talk-videos/princeton2015-slides.pdf}}