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]: Portland stone is hard enough to resist weathering but soft enough to be worked ( cut and carved ) by stonemasons .
[A]: The degree of cementation in Portland stone is such that the stone is sufficiently well cemented to allow it to resist weathering , but not so well cemented that it ca n't be readily worked ( cut and carved ) by masons .


[Q]: Punched tape is a medium for data storage .
[A]: Punched tape or perforated paper tape is a form of data storage , consisting of a long strip of paper in which holes are punched to store data .


[Q]: Single transferable vote ( STV for short ) is a type of voting system .
[A]:
The single transferable vote ( STV ) is a voting system designed to achieve proportional representation through ranked voting in multi-seat organizations or constituencies ( voting districts ) .