Part 1. Definition
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.
Part 2. Example
Rope and its Usage
Answer: Rope
Explanation: The word 'Rope' is the key subject here, while Usage is a property of Rope.
Part 3. Exercise
Next, a certain number of yarns are twisted together to form strands which, at the Admiralty Ropery, Chatham, are usually 150 fathoms in length when completed.
Answer:
a certain number of yarns