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.

Example Input: It is used in the Royal Navy only for small lines and small stuff.
Example Output: It

Example Input: The crew then leave the boat and she is hoisted inboard.
Example Output: the boat

Example Input: The strands tend to unlay unless the end of the rope is whipped (i,e, firmly bound) with twine.
Example Output:
The strands