question: The graph shows an angle $a$ in standard position with its terminal side intersecting the figure at P.
  
  Find the value of $\tan a$.
query_wo: Please directly answer the question and provide the final value, e.g., 1, 2.5, 300.
  Question: The graph shows an angle $a$ in standard position with its terminal side intersecting the figure at P.
  
  Find the value of $\tan a$.
query_cot: Please first conduct reasoning, and then answer the question and provide the final value, e.g., 1, 2.5, 300, at the end.
  Question: The graph shows an angle $a$ in standard position with its terminal side intersecting the figure at P.
  
  Find the value of $\tan a$.
question_for_eval: The graph shows an angle $a$ in standard position with its terminal side intersecting the figure at P.
  
  Find the value of $\tan a$.