Question: What person wrote the song that inspired Marvel Comics' character Rocket Raccoon?

full_context: Document 1: The Beatles (album): The Beatles, also known as the White Album, is the ninth studio album by English rock group the Beatles, released on 22 November 1968. A double album, its plain white sleeve has no graphics or text other than the band's name embossed, which was intended as a direct contrast to the vivid cover artwork of the band's earlier "Sgt. Pepper's Lonely Hearts Club Band". Although no singles were issued from "The Beatles" in Britain and the United States, the songs "Hey Jude" and "Revolution" originated from the same recording sessions and were issued on a single in August 1968. The album's songs range in style from British blues and ska to tracks influenced by Chuck Berry and by Karlheinz Stockhausen.
Document 2: Within You Without You: "Within You Without You" is a song written by George Harrison and released on the Beatles' 1967 album "Sgt. Pepper's Lonely Hearts Club Band". It was Harrison's second composition in the Indian classical style, after "Love You To", and was inspired by his six-week stay in India with his mentor and sitar teacher, Ravi Shankar, over September–October 1966. Recorded in London without the other Beatles, the song features Indian instrumentation such as sitar, dilruba and tabla, and was performed by Harrison and members of the Asian Music Circle. The recording marked a significant departure from the Beatles' previous work; musically, it evokes the Indian devotional tradition, while the overtly spiritual quality of the lyrics reflects Harrison's absorption in Hindu philosophy and the teachings of the Vedas. Although the song was his only composition on "Sgt. Pepper", Harrison's endorsement of Indian culture was further reflected in the inclusion of yogis such as Paramahansa Yogananda among the crowd depicted on the album cover.
Document 3: Lucy in the Sky with Diamonds: "Lucy in the Sky with Diamonds" is a song credited to Lennon–McCartney that appears on the Beatles' 1967 album "Sgt. Pepper's Lonely Hearts Club Band". It was started by John Lennon, then Paul McCartney contributed to it in a songwriting session. Lennon's son Julian inspired the song with a nursery school drawing he called "Lucy—in the sky with diamonds". Shortly after the song's release, speculation arose that the first letter of each of the title nouns intentionally spelled "LSD". Lennon consistently denied this, insisting the song's fantastical imagery was inspired by Lewis Carroll's "Alice in Wonderland" books, a claim repeatedly confirmed by Paul McCartney.
Document 4: Beyonder: The Beyonder is a fictional cosmic entity appearing in American comic books published by Marvel Comics. Created by writer Jim Shooter and artist Mike Zeck, the Beyonder first appeared in "Secret Wars" #1 (May 1984) as an unseen, nearly omnipotent being who kidnapped the heroes and villains of the Marvel Universe and had them do battle on another planet called Battleworld. He later appeared in a more antagonistic role in the 1985 sequel "Secret Wars II", in which he took human form, and threatened to destroy the Marvel multiverse. Although he first took on a physical, humanoid form in "Secret Wars II" #2, it was in "Secret Wars II" #3 that he took on the permanent form in which he remained for the rest of his existence, that of a Caucasian human male with curly black hair. Although the character met his demise at the end of "Secret Wars II", he has subsequently appeared in stories well into the 2000s, although in greatly diminished form.
Document 5: Rockman (comics): Rockman is a fictional superhero appearing in American comic books published by Marvel Comics. The character first appeared in "U.S.A. Comics" #1 (August 1941), published by Marvel predecessor Timely Comics during the 1930s to 1940s period historians and fans call the Golden Age of Comics. As credits were not routinely given in comic books of this period, his writer and artist co-creators are unknown, although the first page of his debut story was drawn by Charles Nicholas (itself a house pen name) and the remainder by Basil Wolverton.
Document 6: Rocket Raccoon: Rocket Raccoon is a fictional superhero appearing in American comic books published by Marvel Comics. Created by writer Bill Mantlo and artist Keith Giffen, the character first appeared in "Marvel Preview" #7 (Summer 1976). He is an intelligent, anthropomorphic raccoon, who is an expert marksman and master tactician. His name and aspects of his character are a nod to The Beatles' 1968 song "Rocky Raccoon".
Document 7: Groot: Groot ( ) is a fictional superhero appearing in American comic books published by Marvel Comics. Created by Stan Lee, Jack Kirby, Larry Lieber, and Dick Ayers, the character first appeared in "Tales to Astonish" #13 (November 1960). An extraterrestrial, sentient tree-like creature, the original Groot first appeared as an invader that intended to capture humans for experimentation.
Document 8: Dear Prudence: "Dear Prudence" is a song by the English rock group the Beatles from their 1968 album "The Beatles" (also known as "the White Album"). The song was written by John Lennon, and credited to Lennon–McCartney. Written in India, it was inspired by Prudence Farrow, a sister of actress Mia Farrow, who became obsessive about meditating while practising with Maharishi Mahesh Yogi.
Document 9: Return to Pepperland: Return to Pepperland is a cancelled Paul McCartney album recorded in 1984–1987. The album was built up of mostly home demos and was a reflection of work from McCartney's career as a member of the English rock band the Beatles. Although it was made around twenty years after the release of the Beatles' 1967 album "Sgt. Pepper's Lonely Hearts Club Band" (which inspired it), some tracks which made their way onto the bootleg were written whilst McCartney was in the Beatles, including the Lennon–McCartney-written "Love Me Do" and "P.S. I Love You". Other songs turned up on CD-single B-sides including the McCartney/Stewart song "Don't Break the Promise".
Document 10: Rocket Raccoon (limited series): Rocket Raccoon was a four-issue comic book limited series that was published in 1985 and featuring the eponymous character. It was written by Bill Mantlo, penciled by Mike Mignola and inked by Al Gordon (Issue # 3 was inked by Al Milgrom). All covers by Mignola and Gordon. The series took place on half world where Rocket and his anthropomorphic allies fought killer clowns with lethal juggling balls and deadly unicycles and who spoke in a stilted language full of alliteration and rhyme.
Document 11: Bill Mantlo: William Timothy "Bill" Mantlo (born November 9, 1951) is an American comic book writer, primarily at Marvel Comics. He is best known for his work on two licensed toy properties whose adventures occurred in the Marvel Universe: "Micronauts" and "Rom", as well as co-creating the original character, Rocket Raccoon. An attorney who worked as a public defender, Mantlo was the victim of a hit-and-run accident in 1992 and has been in institutional care ever since.
Document 12: Rocky Raccoon: "Rocky Raccoon" is a song by the Beatles from the double album "The Beatles" (also known as the "White Album"). The song was primarily written by Paul McCartney, who was inspired while playing acoustic guitar with John Lennon and Donovan in India (where the Beatles had gone on a retreat).
Document 13: Guardians of the Galaxy (2008 team): The Guardians of the Galaxy are a fictional spacefaring superhero team appearing in American comic books published by Marvel Comics. Dan Abnett and Andy Lanning formed the team from existing and previously unrelated characters created by a variety of writers and artists, with an initial roster of Star-Lord, Rocket Raccoon, Quasar, Adam Warlock, Gamora, Drax the Destroyer and Groot.
Document 14: Back in the U.S.S.R.: "Back in the U.S.S.R." is a song by the Beatles. It is credited to the songwriting partnership Lennon–McCartney, but written by Paul McCartney. The song opens the 1968 double-disc album "The Beatles" (also known as the "White Album"), and then segues into "Dear Prudence".
Document 15: Richard Rory: Richard Rory is a fictional character in the Marvel Universe. He initially was a sort of author surrogate or alter ego for writer Steve Gerber, though Gerber is also shown to exist in the Marvel Universe. He was introduced in "Man-Thing" Volume 1, #2, a bit of a loner who rather easily befriended the nearly mindless monster. When in rural areas, he was frequently belittled for having a college education and a rather left-wing perspective. Later, under the pen of David Anthony Kraft, he became friends with She-Hulk, with slight romantic overtones that went nowhere. The character is named after Richard Cory, a nearly opposite character whose song was playing on the radio when Gerber created the character.
ground_truth: Paul McCartney