Question: What sister of a longtime Senator from Massachusetts married Peter Lawford?
Sentence (from "Patricia Kennedy Lawford"): Patricia Helen "Pat" Kennedy Lawford (May 6, 1924 – September 17, 2006) was an American socialite and the sixth of nine children of Rose and Joseph P. Kennedy Sr. She was a sister of President John F. Kennedy, Senator Robert F. Kennedy, and Senator Ted Kennedy.
Relevant evidence: Yes