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]: Three hawser-laid ropes each of 120 fathoms, laid up together in the opposite direction to that of their own lay, will form a cable-laid rope, 100 fathoms in length.
[A]: Three hawser-laid ropes


[Q]: Were this not done, laying the strands together would tend to untwist the yarns in each strand.
[A]: this


[Q]: General characteristics.
[A]:
General characteristics.


