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: After what seemed to be a long opening round in the beginning of a great battle, the gunmen ceased fire.
Example Output: Plural

Example Input: Washoe's progress with ASL was rapid ; by 1971, she had a vocabulary of 160 signs, which she used in conversation.
Example Output: Singular

Example Input: Three clients called to request changes in their commercials.
Example Output:
Plural