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.

Q: After what seemed an age, the actor sat up.

A: Singular
****
Q: His concentration since Iseo left Compostela fell completely to his training.

A: Singular
****
Q: The injection of rumors and key elements of their prepared story into Colony's grapevine would tie this issue down.

A:
Singular
****