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]: Italian hemp is the strongest vegetable fibre used in rope making.
[EX A]: Italian hemp

[EX Q]: It is used in the Royal Navy only for small lines and small stuff.
[EX A]: It

[EX Q]: Hammock lashing.
[EX A]:
Hammock lashing