Robot: It is an automated machine, the difference is that this machine has some intelligence similar to humans or living things, such as perception ability, planning ability, actionability and collaboration ability, it is a highly flexible automated machine. Based on the above definition, which of the following is a robot? ['Machines on automated production lines.', 'A humanoid machine that can say hello in several languages.', 'A machine that plays football.', 'A human-like machine.']