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: His concentration since Iseo left Compostela fell completely to his training.

SOLUTION: Singular

PROBLEM: The bullet had passed right through, not cutting any major arteries.

SOLUTION: Singular

PROBLEM: Before he switched to second, however, there was a jolting crash.

SOLUTION:
Singular