 This paradigm led to innovative work in machine vision by Gerald Sussman ( who led the team ) , <unk> <unk> , David <unk> ( who invented " <unk> <unk> " ) , and especially Patrick Winston . At the same time , Minsky and Papert built a robot arm that could stack blocks , bringing the blocks world to life . The crowning achievement of the micro @-@ world program was Terry <unk> 's <unk> . It could communicate in ordinary English sentences , plan operations and execute them . 
