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]: It was a major event in the history of public health , and the founding event of the science of epidemiology .
[A]: This has been perceived as a major event in the history of public health and regarded as the founding event of the science of epidemiology , having helped shape public health policies around the world .


[Q]: An epicalyx , an additional whorl around the calyx of a single flower , is a modification of bracteoles .
[A]: An epicalyx , which forms an additional whorl around the calyx of a single flower , is a modification of bracteoles In other words , the epicalyx is a " group of bracts resembling a calyx " or " bracteoles forming a whorl outer to the calyx " .


[Q]: A tank car or tank wagon is a type of railroad car designed to transport liquids or gases .
[A]:
A tank car ( International Union of Railways ( UIC ) : tank wagon ) is a type of railroad car ( UIC : railway car ) or rolling stock designed to transport liquid and gaseous commodities .