Question: What is the name of this single-vehicle car accident involving a US Senator and his companion, who was an American teacher, secretary, and political campaign specialist?
Sentence (from "Mary Jo Kopechne"): Mary Jo Kopechne ( ; July 26, 1940 – July 18, 1969) was an American teacher, secretary, and political campaign specialist who died in a car accident at Chappaquiddick Island on July 18, 1969, while she was a passenger in a car being driven by U.S. Senator Ted Kennedy.
Relevant evidence: Yes