About the Authors

Jacob Eisenstein

jacobe@gatech.edu

Affiliation School of Interactive Computing, Georgia Institute of Technology, Atlanta, Georgia, United States of America

Brendan O'Connor

Affiliation School of Computer Science, University of Massachusetts, Amherst, Massachusetts, United States of America

Noah A. Smith

Affiliation School of Computer Science, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America

Eric P. Xing

Affiliation School of Computer Science, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America

Competing Interests

BO and NAS were supported by Google's support of the Reading is Believing project at Carnegie Mellon University. This study was also supported by a computing resources award from Amazon Web Services. There are no patents, products in development or marketed products to declare. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: JE BO NAS EPX. Performed the experiments: JE BO. Analyzed the data: JE BO. Wrote the paper: JE BO NAS.