TASK DEFINITION: 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.
PROBLEM: The tail rushed by and a loud thud followed.

SOLUTION: Singular

PROBLEM: "... reporting indicates multiple nuclear missile strikes at all the major American cities.

SOLUTION: Singular

PROBLEM: The wolves began to wag their tales and roll about on the pavement stones like giant puppies.

SOLUTION:
Plural