text: <START_QUESTION> a man comes into a jail to visit a prisoner there. a guard stops him and says, " hold it right there. only relatives can visit. " the man says, " brothers and sisters, i have none. that man's father is my father's son. " how are the man and prisoner related? <END_QUESTION>
  <ANSWER> prisoner is mans son <END_ANSWER><|endoftext|>