About the Authors

Sagar Indurkhya

Affiliation Computer Science and Artificial Intelligence Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America

Jacob Beal

jakebeal@bbn.com

Affiliation BBN Technologies, Cambridge, Massachusetts, United States of America

Competing Interests

BBN Technologies is an independent research laboratory, and for this work, the only financial interest of BBN is the same as that of a university: publication will improve the chances of obtaining grants relating to the material. There are no patents relating to this manuscript. Jacob Beal is affiliated to BBN Technologies; this affiliation does not impede the data sharing policies of PLoS ONE.

Author Contributions

Conceived and designed the experiments: SI. Performed the experiments: SI. Analyzed the data: SI JB. Contributed reagents/materials/analysis tools: SI JB. Wrote the paper: SI JB.