question: What are at the ends of the ropes to help the gymnists hold it ?
answer: One or two knots at each end are for keeping hold of the rope while doing the routine .
turker_answer: At the ends of the ropes to help the gymnists hold it are one or two knots at each end for keeping hold of the rope while doing the routine .
rule-based: One or two knots at each end are for keeping hold of the rope while doing the routine are at the ends of the ropes to help the gymnists hold it .