You will be given a definition of a task first, then some input of the task.
From the given sentence, extract the phrase (often noun or verb) that carries the given relationship. The generated phrase should be present in the sentence.

Given Relationship: 'be commander in', Sentence: 'Responding to the call of the commander in chief President Gloria Macapagal-Arroyo to contain the insurgency problem in the country , the 803rd Brigade based in Camp Sumoroy , Catarman and led by its brigade commander Col . Roland Rodriguez , vows to sustain intensified combat operations in the brigade area of coverage .'
Output:
commander