solution: Since $\sin \left( -\frac{\pi}{6} \right) = -\frac{1}{2},$ $\arcsin \left( -\frac{1}{2} \right) = \boxed{-\frac{\pi}{6}}.$
prompt.content: <|im_start|>system
  You are a helpful assistant.<|im_end|>
  <|im_start|>user
  Compute $\arcsin \left( -\frac{1}{2} \right).$  Express your answer in radians.
  Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
  <|im_start|>assistant
  
prompt.role: user
extra_info.answer: -\frac{\pi}{6}
extra_info.question: Compute $\arcsin \left( -\frac{1}{2} \right).$  Express your answer in radians.
extra_info.split: test