Question: What year did Maria Shriver's mother die?

Context articles: Kerry Kennedy
Katherine Schwarzenegger
1988 Virginia Slims of Washington – Doubles
William R. and Martha Foster Shriver House
1986 (TV series)
Eunice Kennedy Shriver
Tiger Woods Learning Center
Maria Shriver
We Need to Talk About Kevin
Patrick Schwarzenegger

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.
Katherine Eunice Schwarzenegger (born December 13, 1989) is an American author and the elder daughter of actor/politician Arnold Schwarzenegger and broadcast journalist Maria Shriver.
 A member of the Kennedy family, Schwarzenegger is a great-niece of John F. Kennedy, the 35th President of the United States.
Elise Burgin and Pam Shriver were the defending champions but they competed with different partners that year, Burgin with Robin White and Shriver with Martina Navratilova.
The William R. and Martha Foster Shriver House is a historic residence located in Winterset, Iowa, United States.
 William R. Shriver was an Ohio native who settled in Jefferson County, Iowa before he moved to Madison County in 1853-54.
 He married Martha Foster in 1858 in Winterset.
 He was a wagon-maker by trade, and served as a lieutenant in the 1st Iowa Cavalry during the American Civil War.
 Shriver went into farming in the 1870s, and they left this house at that time.
 He went on to serve as the Clerk of District Court from 1882 to 1887.
 The Shrivers left Iowa for California in 1890 because of Martha's health.
 She died there that same year, and William returned to Iowa permanently in 1900.
1986 is an American news magazine series that aired on NBC from June 10, 1986, to December 30, 1986.
 The lead anchors were Roger Mudd and Connie Chung.
 Maria Shriver also contributed to the program.
Dame Eunice Mary Kennedy Shriver, DSG (July 10, 1921 – August 11, 2009) was a member of the Kennedy family; she was the sister of President John F. Kennedy and senators Robert F. Kennedy and Ted Kennedy.
 Her husband, Sargent Shriver, was the United States Ambassador to France during the Lyndon Johnson presidency and the Democratic vice presidential candidate in the 1972 U.S. presidential election.
The Tiger Woods Learning Center was established in 2006 by Tiger Woods to get students thinking about the role education plays in their futures.
 The learning center is used by several thousand students, with a day program for grades 4-6 and an after schools program for grades 7-12.
 There is also summer program, weekend and community outreach programs and online learning programs.
 The centre features extensive multi-media facilities and an outdoor golf teaching area.
 It offers courses that focuses on careers in math, science, technology and language arts.
 It is housed in a 35,000 square foot (3,300 m²) educational facility in Anaheim, California.
 The center was opened in February 2006.
 Former President Bill Clinton and the First Lady of California Maria Shriver were there for the opening ceremony.
is an American journalist and activist.
 She is the former First Lady of California, and the estranged wife of former California Governor Arnold Schwarzenegger.
 She has received a Peabody Award and was co-anchor for NBC's Emmy-winning coverage of the 1988 Summer Olympics.
 As executive producer of "The Alzheimer's Project", Shriver earned two Emmy Awards and an Academy of Television Arts & Sciences award for developing a "television show with a conscience".
 She is a member of the Kennedy family (her mother, Eunice Kennedy Shriver, was a sister of John F. Kennedy, Robert F. Kennedy, and Ted Kennedy).
 Shriver is currently a special anchor and correspondent for NBC News.
We Need to Talk About Kevin is a 2003 novel by Lionel Shriver, published by Serpent's Tail, about a fictional school massacre.
 It is written from the first person perspective of the teenaged killer's mother, Eva Khatchadourian, and documents her attempt to come to terms with her son Kevin and the murders he committed, as told in a series of letters from Eva to her husband.
 The novel, Shriver's seventh, won the 2005 Orange Prize, a U.K.-based prize for female authors of any country writing in English.
 In 2011 the novel was adapted into a film.
Patrick Arnold Shriver Schwarzenegger (born September 18, 1993) is an American actor and model.
 He is the elder son of Arnold Schwarzenegger and Maria Shriver.
 A member of the Kennedy family, Schwarzenegger is also a great-nephew of John F. Kennedy, the 35th President of the United States, as well as the late United States Senators Robert F. Kennedy and Ted Kennedy.