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.
One example: Rope and its Usage
Solution is here: Rope
Explanation: The word 'Rope' is the key subject here, while Usage is a property of Rope.

Now, solve this: Manila hawser-laid rope is supplied to the Royal Navy in coils of 120 fathoms, and it is marked with one red rogue's yarn in each of two strands.
Solution:
Manila hawser-laid rope