Detailed Instructions: 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: He was the son of actor Peter Lawford and Patricia Kennedy Lawford .
A:
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 .