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 caller hung up.
Example Output: Singular

Example Input: My inquiries took me to Los Angeles where I ran into a stonewall put up by Lorraine's psychiatrist.
Example Output: Plural

Example Input: Since then, science has explained much of these phenomena, and the teaching of morality has become the duty of the parent.
Example Output:
Singular