Q:Generate a question that has the following answer: To visit their father for the following movie plot: The movie revolves around a teenage girl named Rena, a suicidal teenager whose father is serving a long prison sentence. The boy she likes only uses her for sex and other teenage girls tease her relentlessly. Rena and her family travel to the father's prison for the annual family picnic. Things seem to be going just fine, but he eventually becomes abusive and angry. Rena's brother Jay, who is secretly gay, wanders off to tour the prison with another inmate named Buddy. Rena's half-sister Barbie sneaks off to the conjugal visit trailers and engages in sexual intercourse with her stepfather (Rena's father), unbeknownst to the family. After this activity is witnessed by Buddy and Jay, the other inmates watch as Buddy makes her squeal like a pig in exchange for not reporting it to her mother. Jay and Buddy bond, and when the tour is over they secretly kiss passionately. Rena tells her dad that she's pregnant, news which the father does not handle well. When Rena's mother later discovers that her husband is having an affair, they get into a physical fight. When the guards see this they attack him and he stumbles backwards and falls on Rena. Rena rushes to the bathroom, finding that she's bled, and lost the baby. She breaks a picture frame and uses the glass shards to slit her wrists, but Jay saves her just in time. Near the movie's end, Rena's mother (Madge) and the children realize that the father is abusive and that continuing to support him has been holding the family back. Rena realizes that her "fond" memories of her relationship with her father were self-delusions. Madge announces that she is moving the family to Florida. Rena tells her boyfriend about the miscarriage and when he expresses indifference, she causes his prized car to drive into a swimming pool. The end shows the family leaving home for Florida, with Rena's now ex-boyfriend running through the yard screaming at her.
A:
Why are they at the prison.