Google's AlphaGo defeats Go grandmaster Lee Sedol in final match (3)

Demis Hassabis(L), the CEO of Google's London-based AI company DeepMind answers questions during a press conference after South Korean professional Go player Lee Sedol finished the final match of the Google DeepMind Challenge Match against Google's artificial intelligence program, AlphaGo, in Seoul, South Korea, March 15, 2016. Google's Go-playing computer program again defeated its human opponent in a final match on Tuesday that sealed its 4-1 victory. (Xinhua/Yao Qilin)