sentence2_structure: The primary motor cortex<>is located<>in the frontal lobe of the brain
sentence1: The prefrontal cortex, located in the frontal lobe just behind the forehead, is believed to serve as the brain's command center.
sentence2: The primary motor cortex is located in the frontal lobe of the brain.
question: The primary motor cortex is located in which lobe of the brain?