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.
--------
Question: This is made from sisal laid up left-handed because when used for lashing up with a marline hitch it is less likely to unlay than a right- handed rope.

Answer: This


Question: The length of a rope is measured in fathoms.

Answer: The length of a rope


Question: This is made from sisal laid up left-handed because when used for lashing up with a marline hitch it is less likely to unlay than a right- handed rope.

Answer:
This