You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "when did the nba get the 3 point line?" whose answer is 1979–80 season.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when did the nba introduce the 3-point line
Useful Output:

Doc 1:  was clear that the 3-point shot adopted by the league in  Officials from NBA teams and the league have discussed moving the 3-point line
Doc 2: He had Fordham play Columbia in an exhibition game, with a twist: He added a 3-point line. So on Feb. 7, 1945, a Fordham player named John Cahill unofficially
Doc 3: NBA teams averaged less than three, three-point shots a game during that inaugural 1979-80 campaign. 02. The '90s. Heading into the 1994-95
Doc 4: The N.B.A. introduced the 3-point shot in the 1979-80 season. Six players made 3s opening night, and for a decade, Kevin Grevey thought he'd
Doc 5: To assess how the introduction of the three-pointer impacted the offensive value of an NBA center, I investigated the difference between centers