Xia Cui 0001 Sadamori Kojaku Naoki Masuda Danushka Bollegala Solving Feature Sparseness in Text Classification using Core-Periphery Decomposition. 255-264 2018 *SEM@NAACL-HLT https://doi.org/10.18653/v1/s18-2030 https://aclanthology.org/S18-2030/ conf/starsem/2018 db/conf/starsem/starsem2018.html#CuiKMB18