Question: When did they put the 3 point line in?

Disambiguated questions and answers:
context: The three-point line was first tested at the collegiate level in 1945, with a 21-foot line, in a game between Columbia and Fordham, but it was not kept as a rule. There was another one-game experiment in 1958, this time with a 23-foot line, in a game between St. Francis (NY) and Siena. In 1961, Boston University and Dartmouth played one game with an experimental rule that counted all field goals as three points. In 1962, the St. Francis (NY) head coach, Daniel Lynch, once again made the suggestion of a 3pt line to the New York Basketball Writers Association.
question: When was the 3 point line first tested in college basketball?
short_answers: 1945
wikipage: Three-point field goal

context: At the direction of Abe Saperstein, the American Basketball League became the first basketball league to institute the rule in 1961. Its three-point line was a radius of from the baskets, except along the sides. The Eastern Professional Basketball League followed in its 1963–64 season.
question: When did the American Basketball League permanently add the 3 point line?
short_answers: 1961
wikipage: Three-point field goal

context: Three years later in June 1979, the NBA adopted the three-point line for a one-year trial for the despite the view of many that it was a gimmick. Chris Ford of the Boston Celtics is widely credited with making the first three-point shot in NBA history on October 12, 1979; the season opener at Boston Garden was more noted for the debut of Larry Bird (and two new Rick Barry of the Houston Rockets, in his final season, also made one in the same game, and Kevin Grevey of the Washington Bullets made one that Friday night 
question: When did the NBA adopt the three point line for a one year trial?
short_answers: June, 1979
wikipage: Three-point field goal

context: No context provided
question: When was the 3 point line first used in the Olympics?
short_answers: 1988

context: No context provided
question: When did the first NCAA conference use the 3 point line?
short_answers: 1980-81 season

context: Used only in conference play for several years, it was adopted by the NCAA in April 1986 for the 1986–87 season at and was first used in the NCAA Tournament in March 1987. The NCAA adopted the three-pointer in women's basketball on an experimental basis for that season at the same distance, and made its use mandatory beginning In 2007, the NCAA lengthened the men's distance by a foot to , effective with the season, and the women's line was moved to match the men's in 2011–12. American high schools, along with elementary and middle schools, adopted a line nationally in 1987, a year after the NCAA. The NCAA experimented with the FIBA three-point line distance in the National Invitation Tournament (NIT) then adopted that distance for all men's play with a phased conversion that begins with Division I in the 2019–20 season. In that same 2019–20 season, the NCAA is experimenting with the FIBA arc in women's postseason events other than the NCAA championships in each division, most notably the Women's National Invitation Tournament and Women's Basketball Invitational.
question: When did the 3 point line get put in for high schools, elementary schools, and middle schools?
short_answers: 1987
wikipage: Three-point field goal

Long answers:
knowledge: content: A three-point field goal (also 3-pointer, three, or trey) is a field goal in a basketball game made from beyond the three-point line, a designated arc surrounding the basket. 
wikipage: Three-point field goal
long_answer: A three-point field goal, or a 3-pointer, is a field goal in a basketball game made from beyond the three-point line. It was first tested at the collegiate level in 1945. The American Basketball League became the first basketball league to institute the rule in 1961 and then the NBA adopted it for a one-year trial in June of 1979. The first NCAA conference used the 3 point line during the 1980-81 season, leading to high schools, elementary schools, and middle schools in 1987. The Olympics decided to finally use it in 1988.

long_answer: The three-point line was first tested at the collegiate level in 1945, with a 21-foot line, in a game between Columbia and Fordham, but it was not kept as a rule. The American Basketball League became the first basketball league to institute the rule in 1961 and in June 1979, the NBA adopted the three-point line for a one-year trial. The 1980-81 season was the first time a NCAA conference used the 3 point line. The 3 point line was put in for high schools, elementary schools, and middle schools in 1987, and in 1988 it was first used in the Olympics.