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: Naturally, the trains stopped running, so he called me and asked me to give him a ride to the bus station. "

SOLUTION: Plural

PROBLEM: Even the twins were there !

SOLUTION: Plural

PROBLEM: For clever creatures, the rats could be amazingly stupid at times.

SOLUTION:
Plural