Question: When was the democrat defeated by William Milliken  at the Michigan gubernatorial election, 1970 born? 

Context paragraphs:
Michigan gubernatorial election, 2018: The Michigan gubernatorial election of 2018 will take place on November 6, 2018, to elect the Governor of Michigan, concurrently with the election of Michigan's Class I U.S. Senate seat, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections.

Michigan gubernatorial election, 1974: The 1974 Michigan gubernatorial election was held on November 5, 1974.  William Milliken was elected to his second term as Governor of Michigan.

Missouri gubernatorial election, 1856: The Missouri gubernatorial election of 1856 was Missouri's eleventh gubernatorial election.  In the election, which was held on August 2, 1852, the Democratic nominee, Trusten Polk, defeated Know-Nothing candidate Robert C. Ewing (running under the American Party label), and former Senator Thomas H. Benton.  Benton ran as an Independent Democrat under the label "Benton Democrat."

Minnesota lieutenant gubernatorial election, 1970: The 1970 Minnesota lieutenant gubernatorial election took place on November 3, 1970.  State Senator Rudy Perpich of the Minnesota Democratic-Farmer-Labor Party defeated Duluth Mayor Ben Boo of the Republican Party of Minnesota.  The 1970 lieutenant gubernatorial election was the final lieutenant gubernatorial election held before the Minnesota Constitution was amended to provide for elections of the Governor and Lieutenant Governor on a joint ticket.

Michigan gubernatorial election, 1970: The 1970 Michigan gubernatorial election was held on November 3, 1970.  Republican William Milliken won the election, defeating Democrat Sander Levin.

South Carolina gubernatorial election, 1974: The 1974 South Carolina gubernatorial election was held on November 5, 1974 to select the governor of the state of South Carolina.  James B. Edwards defeated W. J. Bryan Dorn and became the first Republican since Daniel Henry Chamberlain in 1874 to win a gubernatorial election in South Carolina.  It was also the closest gubernatorial election in South Carolina since the disputed election of 1876.

Michigan gubernatorial election, 2002: The Michigan gubernatorial election of 2002 was one of the 36 United States gubernatorial elections held on November 5, 2002.  Incumbent Republican John Engler, after serving three terms, had stepped down and was not running; his lieutenant governor Dick Posthumus, also a Republican, ran in his place.  Jennifer Granholm, then Attorney General of Michigan, ran on the Democratic Party ticket.  Douglas Campbell ran on the Green Party ticket, and Joseph M. Pilchak ran on the Constitution Party ticket.

Michigan gubernatorial election, 2014: The Michigan gubernatorial election of 2014 took place on November 4, 2014, to elect the Governor of Michigan, concurrently with the election of Michigan's Class II U.S. Senate seat, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections.

Sander Levin: Sander Martin Levin (born September 6, 1931) is an American politician who has served in the United States House of Representatives since 1983, representing  's 9 congressional district .  Levin, a member of the Democratic Party from Michigan, is the former ranking member on the House Ways and Means Committee; he was Chairman of the Ways and Means Committee from 2010 to 2011.

Helen Milliken: Helen Wallbank Milliken (December 4, 1922 – November 16, 2012) was an American women's rights activist, environmentalist, and former First Lady of Michigan.  Milliken, the longest serving First Lady in Michigan's history, served from 1969 to 1983 during the tenure of her husband, former Michigan Governor William Milliken.  Milliken was known for her activism on behalf of many causes throughout her life.  She was one of Michigan's leading proponents of the proposed Equal Rights Amendment to the United States Constitution during the 1970s.

Supporting paragraphs: Michigan gubernatorial election, 1970 Sander Levin
Answer: September 6, 1931