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:
My father-in-law was so right when he asked me to wait a little with the police.
answer:
Singular

question:
" Flight # 408 now loading at gate 4B on the north concourse, " came over the loudspeaker.
answer:
Singular

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