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.

Example Input: The thud of his head connecting with the glass caused a satisfying crunching sound.
Example Output: Singular

Example Input: " What coin toss ? "
Example Output: Singular

Example Input: As far as she was concerned, his mistress was welcome to him.
Example Output:
Singular