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:
Three strands so laid up constitute a hawser-laid rope, which is the type of cordage most commonly used.
answer:
Three strands


question:
the strands are twisted up together to form the rope, and
answer:
the strands


question:
MATERIALS USED.
answer:

MATERIALS USED