问：如何下载AAAI系列文章答：例子：3955: Simultaneous Learning of Pivots and Representations for Cross-Domain Sentiment ClassificationLiang Li (School of Software, Tsinghua University); Weirui Ye (Tsinghua University); Mingsheng Long (TsinghuaUniversity)*; Yateng Tang ( Tencent Inc.); Jin Xu (Tencent Inc.); Jianmin