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:
If I worked fast enough, adrenaline put up a wall between me and my throbbing headache.
answer:
Singular


question:
The green LED on the bottom right of the screen turned red.
answer:
Singular


question:
For one thing, passengers tend to eat.
answer:

Plural