In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
Q: Larger buildings may use a wrecking ball swung by a crane .
A: 
Larger buildings may require the use of a wrecking ball , a heavy weight on a cable that is swung by a crane into the side of the buildings .