With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Hangover Part III stars Justin Bartha.
text_B: The Hangover Part III is a 2013 American comedy film produced by Legendary Pictures and distributed by Warner Bros. .. Legendary Pictures. Legendary Pictures. comedy film. comedy film. Pictures .. It is the third and final installment in The Hangover trilogy .. The film stars Bradley Cooper , Ed Helms , Zach Galifianakis , Justin Bartha , and Ken Jeong .. Bradley Cooper. Bradley Cooper. Ed Helms. Ed Helms. Zach Galifianakis. Zach Galifianakis. Ken Jeong. Ken Jeong. Justin Bartha. Justin Bartha. The supporting cast includes Jeffrey Tambor , Heather Graham , Mike Epps , Melissa McCarthy and John Goodman with Todd Phillips directing a screenplay written by himself and Craig Mazin .. Todd Phillips. Todd Phillips. Craig Mazin. Craig Mazin. Melissa McCarthy. Melissa McCarthy. Jeffrey Tambor. Jeffrey Tambor. Heather Graham. Heather Graham. Mike Epps. Mike Epps. John Goodman. John Goodman. The film follows the `` Wolfpack '' -LRB- Phil , Stu , Doug , and Alan -RRB- as they try to get Alan the help he needs after facing a personal crisis .. However , things go awry when an incident from the original film comes back to haunt them .. The Hangover Part III was announced days before the release of The Hangover Part II and Mazin , who co-wrote Part II , was brought on board .. The Hangover Part II. The Hangover Part II. In January 2012 , the principal actors re-signed to star .. In March 2012 , Warner Bros. announced a U.S. Memorial Weekend release .. Memorial Weekend. Memorial Day. The supporting roles were cast between June and September 2012 .. Principal photography began in September 2012 in Los Angeles , California before moving to Nogales , Arizona and Las Vegas , Nevada .. Principal photography. Principal photography. The film was released on May 23 , 2013 .
related.