I lead the Knowledge Graph Science team. We develop methods and systems to collect, organize and utilize information about entities. We extract information about entities from the Web. We construct large knowledge graphs such Yahoo's Knowledge Graph and Product Graph. We develop content analysis systems, semantic search services, and rich entity-oriented user experiences. My personal interests are in information extraction, large-scale knowledge graph construction and management, semantic search, content understanding, and obviously machine learning. I previously worked on Web Search, Shopping Comparison and Text-to-Speech Synthesis.