Question: Mary Jo Kopechne, 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, it was the result of U.S. Senator Ted Kennedy's negligence and resulted in the death of his 28-year-old companion, Mary Jo Kopechne, who was trapped inside the vehicle, the event occurrence is known as what?
Context: Jean Ann Kennedy Smith (born February 20, 1928) is an American diplomat who served as United States Ambassador to Ireland from 1993 to 1998.  She is the eighth of nine children born to Joseph P. Kennedy, Sr. and Rose Fitzgerald, and is their longest-lived and last surviving child.  Her siblings include President John F. Kennedy, Senator Robert F. Kennedy, longtime Senator Ted Kennedy, and Special Olympics founder Eunice Kennedy Shriver. Victoria Anne Reggie "Vicki" Kennedy (born February 26, 1954) is an American lawyer and the second wife and widow of longtime U.S. Senator Ted Kennedy of Massachusetts, who was twenty-two years her senior. 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. Kara Anne Kennedy Allen (February 27, 1960 – September 16, 2011) was a member of the American political dynasty, the Kennedy family.  She was the oldest of the three children of U.S. Senator Ted Kennedy from Massachusetts and Joan Bennett Kennedy, and a niece of President John F. Kennedy and Senator Robert F. Kennedy. Mary Kerry Kennedy (born September 8, 1959) is an American human rights activist and writer.  She is the seventh child and third daughter of Robert F. Kennedy and Ethel Skakel Kennedy.  After her 15-year marriage to now-New York Governor Andrew Cuomo, she was known as Kerry Kennedy Cuomo from 1991 until 2003.  She is the president of Robert F. Kennedy Human Rights.  She is also a niece of the late President John F. Kennedy and United States Senator Ted Kennedy, and a cousin of former U.S. Ambassador to Japan Caroline Kennedy and Maria Shriver, the estranged wife of actor, bodybuilder, and former California Governor Arnold Schwarzenegger. Patrick Kennedy (February 16, 1823 – November 22, 1858) was an Irish farmer, businessman, and politician who moved to East Boston, Massachusetts from County Wexford, Ireland.  He was born in New Ross, Ireland.  He was the father of businessman/politician P. J. Kennedy, paternal grandfather of businessman/politician Joseph P. Kennedy Sr., and patrilineal great-grandfather of World War II casualty Joseph P. Kennedy Jr., President John F. Kennedy, Senator Robert F. Kennedy, and longtime Senator Ted Kennedy. "The Dream Shall Never Die" was a speech delivered by U.S. Senator Ted Kennedy at the Democratic National Convention on August 12, 1980.  In the address, Kennedy defended post-World War II liberalism, advocated for a national healthcare insurance model, criticized former actor and Republican presidential nominee Ronald Reagan, and implicitly rebuked incumbent President Jimmy Carter (to whom he had conceded the Democratic nomination only the night before) for his more moderate political stances.  It has been remembered by some as Kennedy's best speech, and one of the most influential orations of the era. The Chappaquiddick incident was a single-vehicle car accident on Chappaquiddick Island, Massachusetts, on Friday, July 18, 1969, that was the result of U.S. Senator Ted Kennedy's negligence and resulted in the death of his 28-year-old companion, Mary Jo Kopechne, who was trapped inside the vehicle. Juan Verde Suárez (born July 7, 1971) is a business and social entrepreneur who worked on the political campaigns of Senator Ted Kennedy, President Bill Clinton, Vice President Al Gore, Senator John Kerry, and Secretary of State Hillary Clinton, besides serving as International Co-Chair for the reelection campaign of President Barack Obama in 2012.  In addition to developing and directing a strategy designed to mobilize millions of American citizens residing outside of the United States, Mr. Verde serves as an advisor to President Obama on international trade, the Hispanic vote as well as sustainability related issues.  Mr. Verde was appointed by President Barack Obama as Deputy Assistant Secretary for Europe and Eurasia at the US Department of Commerce where he served until 2011. The Kennedy Compound consists of three houses on six acres (24,000 m²) of waterfront property on Cape Cod along Nantucket Sound in Hyannis Port, Massachusetts, United States.  It was once the home of American businessman and political figure Joseph P. Kennedy Sr., his wife Rose, and two of their sons, President John F. Kennedy and Senator Robert F. Kennedy.  Their youngest son, Senator Ted Kennedy, lived in his parents' house, and it was his main residence from 1982 to 2009.  He died of brain cancer at the compound in August 2009.
Answer: Chappaquiddick incident