In this task you are given a sentence. You must judge whether subject of the main clause is singular or plural. Label the instances as "Singular" or "Plural" based on your judgment.

Q: The ambassador was an ally and friend, who owed his post in Washington, D.C. to the Owl's influence and discreet lobbying.

A: Singular
****
Q: His thrusts slowed down to an unbearably slow pace.

A: Plural
****
Q: What if the authorities hadn't bought the story ?

A:
Plural
****