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 Input:
The length of a rope is measured in fathoms.

Ex Output:
The length of a rope


Ex Input:
Hemp rope.

Ex Output:
Hemp rope


Ex Input:
It is marked with a red rogue's yarn in each strand.

Ex Output:

It