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.

Example Input: The timbre of the engines climbed, and the Bell accelerated to its maximum speed.
Example Output: Singular

Example Input: Your fears are groundless.
Example Output: Plural

Example Input: Although intellectually it was a concept simple to grasp, the sheer bravado of it struck Ambrose hard.
Example Output:
Singular