Question: how is Bart to the Future and Ralph Wiggum related?

full_context: Document 1: Barting Over: "Barting Over" is the eleventh episode of the fourteenth season of "The Simpsons", advertised by Fox, and indicated on-screen to be the 300th episode of the show (though in broadcast order, it is the 302nd episode, as noted in the episode proper). It originally aired on the Fox network in the United States on February 16, 2003. In this episode, Bart discovers that he used to be a child star in commercials—and that Homer spent all the money he earned. In retaliation, Bart petitions the court to be legally emancipated, and he moves out of the house.
Document 2: 22 for 30: "22 for 30" is the seventeenth episode of the twenty-eighth season of the animated television series "The Simpsons", and the 613th episode of the series overall. It aired in the United States on Fox on March 12, 2017. In a parody of "30 for 30", Bart goes from delinquent with detention to the star basketball player at Springfield Elementary. Lisa covers Bart's success for the school paper, and Homer becomes the team's coach. Things go awry when Bart gets involved with the mafia.
Document 3: Ralph Wiggum: Ralph Wiggum is a recurring character on the animated series "The Simpsons", voiced by Nancy Cartwright. The son of Police Chief Wiggum and a classmate of Lisa Simpson, Ralph is best known as the show's resident oddball, and is noted for his non sequiturs and erratic behavior. His lines range from nonsensical, or bizarre interpretations of a current event, to surprisingly profound statements that go over people's heads; and his behavior varies between blissfully unaware, to dim-witted, to awkwardly spontaneous, even occasionally straightforward. The very nature of the character has undergone seemingly differing interpretations over the years and within various media.
Document 4: Bart to the Future: "Bart to the Future" is the seventeenth episode of the eleventh season of the American animated television sitcom "The Simpsons". It originally aired on the Fox network in the United States on March 19, 2000. In the episode, after their picnic in the park is cut short due to a mosquito infestation, the Simpsons stop by at an Indian casino. There, Bart is prevented from entering because of his age. He manages to sneak in but is caught by the guards and sent to the casino manager's office. The Native American manager shows Bart a vision of his future as a washed-up, wannabe rock musician living with Ralph Wiggum, while Lisa has become the President of the United States and tries to get the country out of financial trouble. "Bart to the Future" was the second episode of "The Simpsons" after "Lisa's Wedding" to be set in the future.
Document 5: Make Room for Lisa: "Make Room for Lisa" is the sixteenth episode of "The Simpsons"' tenth season. It first aired on the Fox network in the United States on February 28, 1999. In the episode, while visiting the Smithsonian expedition, Homer Simpson meets a businesswoman who convinces him to build a cell phone tower in the Simpsons house, making it take up Lisa's room. Lisa is forced to share Bart's room, but the stress of living in the same room as Bart gives her stomach aches. Homer and Lisa decide to visit a New Age store, where the owner convinces them to go on a spiritual journey by lying in a sensory deprivation tank for a prolonged amount of time.
Document 6: Nancy Cartwright: Nancy Jean Cartwright (born October 25, 1957) is an American voice actress, film and television actress, and comedian. She is known for her long-running role as Bart Simpson on the animated television series "The Simpsons". Cartwright also voices other characters for the show, including Nelson Muntz, Ralph Wiggum, Todd Flanders, Kearney, and Database.
Document 7: Groundskeeper Willie: Dr. William MacDougal, usually known as Groundskeeper Willie, is a recurring character on "The Simpsons", voiced by Dan Castellaneta. He is the head groundskeeper at Springfield Elementary School. Willie is almost feral in nature and is immensely proud of his native Scotland. He is easily identifiable by his flaming red hair and beard, as well as his aggressive temperament and thick though inaccurate Scottish accent.
Document 8: Bart Simpson: Bartholomew JoJo "Bart" Simpson is a fictional character in the American animated television series "The Simpsons" and part of the Simpson family. He is voiced by Nancy Cartwright and first appeared on television in "The Tracey Ullman Show" short "Good Night" on April 19, 1987. Cartoonist Matt Groening created and designed Bart while waiting in the lobby of James L. Brooks' office. Groening had been called to pitch a series of shorts based on his comic strip, "Life in Hell", but instead decided to create a new set of characters. While the rest of the characters were named after Groening's family members, Bart's name is an anagram of the word "brat". After appearing on "The Tracey Ullman Show" for three years, the Simpson family received its own series on Fox, which debuted December 17, 1989.
Document 9: Days of Future Future: "Days of Future Future" is the eighteenth episode of the 25th season of the American animated sitcom "The Simpsons", and the 548th episode of the series. It first aired on the Fox network in the United States on April 13, 2014. It was written by J. Stewart Burns and directed by Bob Anderson. The episode is a sequel to "Future-Drama" and a continuation of "Holidays of Future Passed", set 30 years from the present. In this futuristic installment, Bart goes to a clinic to rid himself of his feelings for his ex-wife Jenda (who is now dating a xenomorph-like alien named Jerry), Lisa must choose whether or not to cure her zombie husband Milhouse after he gets bitten by a homeless zombie, and Marge (after putting up with years of Homer dying and being cloned back to life by Professor Frink) loads Homer onto a flatscreen monitor and throws him out of the house.
Document 10: Hans Moleman: Hans Moleman is a recurring character on the animated television series "The Simpsons". He was created by series creator Matt Groening and is voiced by Dan Castellaneta and first appeared in the episode "Principal Charming". His appearance usually comes in the form of a running gag, in which, as a bystander to disastrous events, he suffers unfortunate, often seemingly fatal accidents, only to return in later episodes completely unharmed.
Document 11: Exit Through the Kwik-E-Mart: "Exit Through the Kwik-E-Mart" is the fifteenth episode of the twenty-third season of the American animated television sitcom "The Simpsons". It originally aired on the Fox network in the United States on March 4, 2012. In the episode, Bart is punished by Homer after letting a rabbit loose in the house. He gets revenge on his father by spray-painting images of him with the word "dope" all over Springfield. Street artist Shepard Fairey encounters Bart one night and offers him a gallery show of Bart's artworks. However, Chief Wiggum suddenly appears during the show and arrests Bart for covering the town in graffiti. It turns out that Fairey is an undercover officer working for Wiggum.
Document 12: Chief Wiggum: Chief Clarence "Clancy" Wiggum is a fictional character from the animated television series "The Simpsons", voiced by Hank Azaria. He is the chief of police in the show's setting of Springfield. He is the father of Ralph Wiggum and the husband of Sarah Wiggum.
Document 13: Future-Drama: "Future-Drama" is the fifteenth episode of "The Simpsons"<nowiki>'</nowiki> sixteenth season. The 350th episode overall, it originally aired on the Fox network in the United States on April 17, 2005. In the episode, Bart and Lisa stumble into Professor Frink's basement, and he gives them a look into their future as teenagers as they get ready for their high school graduation. Matt Selman wrote the episode, and Mike B. Anderson served as director. Amy Poehler and John DiMaggio guest-starred as the characters of Jenda and Bender respectively.
Document 14: Bart vs. Thanksgiving: "Bart vs. Thanksgiving" is the seventh episode of "The Simpsons"<nowiki>'</nowiki> second season. It originally aired on the Fox network in the United States on November 22, 1990. In the episode, Lisa makes a table centerpiece for the Thanksgiving dinner, which Bart accidentally destroys. After he is sent to his room by his parents, Bart runs away from home and stays at a soup kitchen for homeless people. Bart returns home eventually and climbs to the roof of the Simpson family's house, where he hears Lisa sobbing. He apologizes to her, and the family happily enjoys a meal of leftovers.
Document 15: Krusty the Clown: Herschel Shmoikel Pinchas Yerucham Krustofsky, better known as Krusty the Clown (sometimes spelled as Krusty the Klown), is a cartoon character in the animated television series "The Simpsons". He is voiced by Dan Castellaneta. He is the long-time clown host of Bart and Lisa's favorite TV show, a combination of kiddie variety television hijinks and cartoons including "The Itchy & Scratchy Show". Krusty is often portrayed as a cynical, burnt-out, addiction-riddled smoker who is made miserable by show business but continues on anyway. He has become one of the most common characters outside of the main Simpson family and has been the focus of several episodes, most of which also spotlight Bart.
ground_truth: animated