The captchas trains AI to recognize the shape of helicopter. "Select all humans in this picture" captchas will be hard, but "select friendly helicopter to add t

The captchas trains AI to recognize the shape of helicopter. "Select all humans in this picture" captchas will be hard, but "select friendly helicopter to add to set {excluded shapes} " for targeting seems not. Its because set {humans} are diverse set of shapes and helicopters are static.