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.

Example Input: the strands are twisted up together to form the rope, and
Example Output: the strands

Example Input: One must learn to interpret these characteristics.
Example Output: these characteristics

Example Input: Four-stranded (rot-proofed manila or sisal) rope, laid up round a heart or centre made of the same material, is known as shroud-laid rope.
Example Output:
Four-stranded (rot-proofed manila or sisal) rope

