Passage: William Jefferson Clinton (born William Jefferson Blythe III; August 19, 1946) is an American politician who served as the 42nd president of the United States from 1993 to 2001. Prior to his presidency, he served as governor of Arkansas (1979–1981 and 1983–1992) and as attorney general of Arkansas (1977–1979). A member of the Democratic Party, Clinton was known as a New Democrat, and many of his policies reflected a centrist "Third Way" political philosophy. He is the husband of former Secretary of State and former U.S. Senator Hillary Clinton. In 1998, Clinton was impeached by the House of Representatives. The impeachment was based on accusations that Clinton committed perjury and obstruction of justice for the purpose of concealing his affair with Monica Lewinsky, a 22-year-old White House intern. He was acquitted by the Senate and completed his term in office. Clinton is notable as one of only two U.S. presidents (following Andrew Johnson 130 years earlier) to have been impeached.
 Link Information: When the first president, George Washington, announced in his Farewell Address that he was not running for a third term, he established a "two-terms then out" precedent. Precedent became tradition after Thomas Jefferson publicly embraced the principle a decade later during his second term, as did his two immediate successors, James Madison and James Monroe. In spite of the strong two-term tradition, Ulysses S. Grant sought a non-consecutive third term in 1880, as did Theodore Roosevelt in 1912 (though it would have been only his second full term). Both were unsuccessful.
In 1940, after leading the nation through the Great Depression, Franklin Roosevelt was elected to a third term, breaking the self-imposed precedent. Four years later, with the U.S. engaged in World War II, he was re-elected again despite his declining physical health; he died 82 days into his fourth term on April 12, 1945.

In response to the unprecedented length of Roosevelt's presidency, the Twenty-second Amendment was adopted in 1951. The amendment bars anyone from being elected president more than twice, or once if that person served more than two years (24 months) of another president's four-year term. Harry S. Truman, president when this term limit came into force, was exempted from its limitations, and briefly sought a second full term—to which he would have otherwise been ineligible for election, as he had been president for more than two years of Roosevelt's fourth term—before he withdrew from the 1952 election.

Since the amendment's adoption, five presidents have served two full terms: Dwight D. Eisenhower, Ronald Reagan, Bill Clinton, George W. Bush, and Barack Obama. Both Jimmy Carter and George H. W. Bush sought a second term but were defeated. Richard Nixon was elected to a second term, but resigned before completing it. Lyndon B. Johnson, having held the presidency for one full term in addition to only 14 months of John F. Kennedy's unexpired term, was eligible for a second full term in 1968, but he withdrew from Democratic Primary. Additionally, Gerald Ford, who served out the last two years and five months of Nixon's second term, sought a full term but was defeated by Jimmy Carter in the 1976 election. Question: How many people have served two terms in the office that Clinton held from 1993 to 2001?
Output: Answer: 13