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]: Rot-proofing was discontinued in 1963, because rot-proofed cordage has deteriorated in hot and humid conditions.
[A]: Rot-proofing

[Q]: It is obviously important to keep her bilges clear of rocks or large stones.
[A]: her bilges

[Q]: It is grown in Kenya, Tanganyika, Haiti and Java and, when new and untreated, is hairy and of a pale straw colour.
[A]:
It