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 human race needs things inventing constantly in order to evolve.
Singular

The dragon lay staked and tethered, a dozen paces away.
Singular

For the safety of all, the identity of the prisoner must remain a mystery, the Sphinx said.

Singular