https://doi.org/10.18653/v1/P17-2101
http://www.cse.unt.edu/
http://www.aclweb.org/anthology/P16-1166
http://www.aclweb.org/anthology/D14-1108
http://www.aclweb.org/anthology/D14-1214
https://doi.org/10.1145/219717.219748
http://www.aclweb.org/anthology/N13-1039
http://www.aclweb.org/anthology/D11-1141
http://www.aclweb.org/anthology/P14-2114