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

A: Singular
****
Q: Silk's daggers were already doing their deadly work.

A: Plural
****
Q: Things keep going from bad to worse. "

A:
Plural
****