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: Ahead of the ship, the relatively calm seas were washing against slate grey rocks that rose seven or eight feet up out of the waters.
Example Output: Plural

Example Input: " Flight # 408 now loading at gate 4B on the north concourse, " came over the loudspeaker.
Example Output: Singular

Example Input: Then after that, if all the parties are in agreement, then the contract will extend to a permanent status.
Example Output:
Singular