context: Joseph Frederick Engelberger (26 July 1925 - 1 December 2015) is an American physicist, engineer, and businessman. After getting a license from George Devol, Engelberger developed the first industrial robot in the United States, Unimate, in the 1950s. Then, he works as a businessman and advocate of robot technology, more than just manufacturing, namely the service industry, health services, and space exploration. He has been known as "Mr. Robotik" because of his contribution in this field. [1] [2]
question: Who invented the first robot?
answers.text: Joseph Frederick Engelberger