Dr. Makoto Yamada is a research scientist at Yahoo Labs. His research interests include machine learning and its application to natural language processing, signal processing, and computer vision. He has published numerous research articles in top venues within these fields, including the IEEE Transactions on Pattern Analysis and Machine Intelligence (PAMI), International Journal of Computer Vision (IJCV), Machine Learning Journal (MLJ), Neural Computation (NECO), NIPS, ICML, AISTATS, AAAI, IJCAI, CIKM, ICDM, and ECCV. Dr. Jianhui Chen is a research scientist in Yahoo Labs. His research interests include multi-task learning, kernel learning, dimension reduction, and stochastic optimization. He has published research papers in top machine learning/data mining venues, including ICML, NIPS, AISTATS, IJCAI, KDD, TPAMI, JMLR, and TKDD. He also serves as PC members/reviewers for multiple top conferences/journals in relevant fields. Dr. Yi Chang is director of sciences in Yahoo Labs, where he leads the search and anti-abuse science group. His research interests include web search, applied machine learning, and social media mining. Yi has published more than 70 conference/journal papers, and he is a co-author of the book, Relevance Ranking for Vertical Search Engines. Yi is an associate editor for Neurocomputing, Pattern Recognition Letters, and he has served as workshops co-organizers, conference organizer committee members, and area chairs for multiple conferences, including WWW, SIGIR, ICML, KDD, CIKM, etc.