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 ribbons are then twisted up into yarns, and the twist given binds the fibres firmly together so that they hold by friction when the yarn is subjected to strain.

Output: The ribbons

Input: Consider Input: It should therefore be examined frequently for signs of deterioration.

Output: It

Input: Consider Input: In the Royal Navy cordage is described by reference to the circumference of the rope measured in inches and to the material from which it is made-for example, 4-inch manila.
Output: cordage