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.

Input: Consider Input: The shorter the length of the fibres the harder this twist must be to give the necessary strength to the yarn.

Output: the yarn

Input: Consider Input: It is very hairy, and brown in colour.

Output: It

Input: Consider Input: 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.
Output: it