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.

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

A: This
****
Q: It is used in the Royal Navy only for small lines and small stuff.

A: It
****
Q: Then it is laid over the two foremost thwarts.

A:
it
****