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.

It is somewhat weaker than three-stranded rope of a similar size, but is less liable to stretch.
It

Manila cable-laid rope is supplied in coils of 100 fathoms.
Manila cable-laid rope

The older and more worn the rope, the less elasticity it will possess and the weaker it will become.

the rope