input: Background: The time and space hierarchy theorems form the basis for most separation results of complexity classes. For instance, the time hierarchy theorem tells us that P is strictly contained in EXPTIME, and the space hierarchy theorem tells us that L is strictly contained in PSPACE.
  Question: What is responsible for constraining P according to the time hierarchy theorem?
  Answer:<extra_id_0>.
output: <extra_id_0> EXPTIME<extra_id_1>