instruction:
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.
question:
WAV ( or WAVE ) , short for Waveform Audio File Format , is a Microsoft and IBM audio file format standard for storing an audio bitstream on PCs .
answer:
Waveform Audio File Format ( WAVE , or more commonly known as WAV due to its filename extension ; pronounced " wave " or ) is an audio file format standard , developed by Microsoft and IBM , for storing an audio bitstream on PCs .


question:
He was the son of actor Peter Lawford and Patricia Kennedy Lawford .
answer:
He was a member of the prominent Kennedy family , and son of actor Peter Lawford and Patricia " Pat " Kennedy Lawford , who was the sister of President John F. Kennedy .


question:
Observations of the star S2 in orbit around Sagittarius A * were used to show the presence of the Milky Way 's central supermassive black hole .
answer:

Observations of a number of stars orbiting around Sagittarius A * , most notably the star S2 , have been used to provide evidence for the presence of , and produce data about , the Milky Way 's hypothesized central supermassive black hole , and have led some scientists to conclude that Sagittarius A * is beyond any reasonable doubt the site of that black hole .