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]: His concentration since Iseo left Compostela fell completely to his training.
[A]: Singular


[Q]: The opening strains of a Strauss waltz filled the room, and the dancers looked about in confusion.
[A]: Plural


[Q]: This huge upright mass did not, however, rise directly from the sea.
[A]:
Singular