TASK DEFINITION: In this task, you are given a sentence. You must find the primary subject in the supplied sentence. The output must be a sub-sequence in the sentence.
PROBLEM: It is obviously important to keep her bilges clear of rocks or large stones.

SOLUTION: her bilges

PROBLEM: Construction and types.

SOLUTION: Construction

PROBLEM: This should be secured in the stern-sheets of the first boat.

SOLUTION:
This