@inproceedings {5326, title = {Topic Shifts Between Two US Presidential Administrations}, booktitle = {Web Archiving and Digital Libraries Workshop (WADL)}, year = {2017}, url = {https://vtechworks.lib.vt.edu/bitstream/handle/10919/97989/WADL2017.pdf$\#$page=13}, author = {Ziquan Wang and Borui Lin and Ian Milligan and Jimmy Lin} }