text: <START_QUESTION> a detective walked up to a door. before he went inside, he heard: " no bob! dont! " then there was a large bang! well, the detective ran inside the door, to find a plumber, an electrician, and a traveling salesman. there was also a dead woman on the floor with a gun beside her. the detective immediately arrested the traveling salesman. how did he know it was the traveling salesman that killed the woman? <END_QUESTION>
  <ANSWER> plumber and electrician were girls <END_ANSWER><|endoftext|>