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.

[EX Q]: In the Royal Navy hawser-laid rope is normally laid up right-handed; that is the strands twist away from the eye in a right-handed spiral, as in fig. 6.2.
[EX A]: hawser-laid rope

[EX Q]: Because it is not so reliable as manila it is not used for boats, falls, slings or for any purpose where the parting of the rope may endanger life.
[EX A]: it

[EX Q]: Rot-proofing neither weakens the rope nor increases its weight, but makes it watertight to the extent that, when wet, it absorbs hardly any water and is nearly as light and as easily handled as when it is dry.
[EX A]:
Rot-proofing