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.

The back yard was essentially a long sweeping lawn with pockets of ruddy sand dunes and rocks running into the wild ocean.
Singular

Hands wrapped around his waist and helped him to his feet.
Plural

These three attributes are simultaneously present in all humans, even while different people may have different mix of the three attributes.

Plural