instruction:
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.
question:
His thumbs were tracing patterns on my face, and it was hard to think or form coherent responses.
answer:
Plural


question:
The opening strains of a Strauss waltz filled the room, and the dancers looked about in confusion.
answer:
Plural


question:
A teacher screaming, " Open it, Blake. "
answer:

Singular