instruction:
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.
question:
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


question:
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, 4Â½-inch manila.
answer:
cordage


question:
The sternsheetsman has to tend it.
answer:

The sternsheetsman


