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 courtyard is shaking so badly that for a second I'm not sure I haven't caused another earthquake.
Example Output: Singular

Example Input: Your skills are impeccable, but this program involves strict discipline.
Example Output: Plural

Example Input: Lust pounded through his veins as her smell invaded his senses.
Example Output:
Singular