Question: Who voiced the title character in a 30-minuted animated film based on a song written by Leonard Lipton and Peter Yarrow?

Context paragraphs:
Day Is Done (Peter, Paul and Mary song): "Day Is Done" is a song written by Peter Yarrow.  It was recorded by Yarrow's group Peter, Paul and Mary and released as a single in 1969.  The song reached No. 21 on "Billboard" Hot 100, and was ranked No. 48 on the "Billboard" year-end Top Easy Listening Singles chart of 1969.

Kim Possible: A Sitch in Time: Kim Possible: A Sitch in Time (also known as Kim Possible Movie: A Sitch in Time) is a 2003 American made-for-TV animated film by Walt Disney Television.  It is the first film based on the original television series "Kim Possible", about a crime-fighting high-school cheerleader named Kim Possible, who battles a band of time-traveling criminals.  The film was directed by Steve Loter for the Disney Channel.  It contains elements of action, comedy, and science fiction, and was created with a mix of traditional and computer-generated animation.  The starring voices are Christy Carlson Romano as the title character and Will Friedle as her sidekick and best friend Ron Stoppable.  This is the first feature-length film based on the "Kim Possible" TV show, followed by "" in 2005.

Ariel (Disney): Ariel is a fictional character and the title character of Walt Disney Pictures' 28th animated film "The Little Mermaid" (1989).  She subsequently appears in the film's prequel television series (1992—1994), direct-to-video sequel "" (2000), and direct-to-video prequel "" (2008).  Ariel is voiced by Jodi Benson in all official animated appearances and merchandise.  She is fourth in the Disney Princess lineup, the first nonhuman princess, and the only princess to become a mother to her own child.

Torn Between Two Lovers: "Torn Between Two Lovers" is a pop song written by Peter Yarrow (of the folk music trio Peter, Paul & Mary) and Phillip Jarrell.  The song describes a love triangle and laments that "loving both of you is breaking all the rules".  Yarrow originally intended the song to be sung by a man, but it was ultimately made famous by a woman, Mary MacGregor, who recorded it at Muscle Shoals Sound Studio in 1976.  The song became the title track of MacGregor's first album.

Eleanor Barooshian: Eleanor Barooshian (April 2, 1950 – August 30, 2016), also known as Eleanor Baruchian and as Chelsea Lee, was a member of the band the Cake (formed in New York in 1966).  In 1967, Barooshian appeared in "You Are What You Eat", a documentary film produced by Peter Yarrow of folk group Peter, Paul & Mary.  In the film, Barooshian performed the Sonny & Cher hit "I Got You Babe" with Tiny Tim.  She sang the male part while Tiny sang the female.  Yarrow cast them after seeing them perform at Steve Paul's The Scene in New York.

Puff, the Magic Dragon: "Puff, the Magic Dragon" (or "Puff") is a song written by Leonard Lipton and Peter Yarrow, and made popular by Yarrow's group Peter, Paul and Mary in a 1963 recording.

Jake and the Never Land Pirates: Jake and the Never Land Pirates (also known as Captain Jake and the Never Land Pirates in the fourth season and associated merchandise) is an Annie Award-winning musical and interactive American children's animated television series shown on Disney Junior.  It is based on Disney's "Peter Pan" franchise, which in turn is based on the famous book and play by British author J. M. Barrie.  It is the first Disney Junior original show following the switch from Playhouse Disney.  It stars Sean Ryan Fox from "Henry Danger", Megan Richie, Jadon Sand, David Arquette, Corey Burton, Jeff Bennett, Loren Hoskins and Dee Bradley Baker.  The title character Jake was previously voiced by Colin Ford, and then later by Cameron Boyce, while Izzy was voiced for the first three seasons by Madison Pettis and Cubby was voiced by Jonathan Morgan Heit.  The series is created by Disney veteran Bobs Gannaway, whose works include another Disney Junior series, "Mickey Mouse Clubhouse", and films such as "Secret of the Wings", "The Pirate Fairy" and "".  The last episode aired on November 6, 2016.

Puff the Magic Dragon (film): Puff the Magic Dragon is a 30-minute animated television film based on the song of the same name by Peter, Paul and Mary.  The title character was voiced by Burgess Meredith.  The doctors were voiced by Frank Nelson, Regis Cordic, and Charles Woolf.  The special first aired October 30, 1978 on CBS.

Peter Yarrow: Peter Yarrow (born May 31, 1938) is an American singer and songwriter who found fame with the 1960s folk music trio Peter, Paul and Mary.  Yarrow co-wrote (with Leonard Lipton) one of the group's greatest hits, "Puff, the Magic Dragon".  He is also a political activist and has supported causes that range from opposition to the Vietnam War to the creation of Operation Respect, an organization that promotes tolerance and civility in schools.

Puff and the Incredible Mr. Nobody: Puff and the Incredible Mr. Nobody is a 30-minute animated television film loosely based on the song "Puff, the Magic Dragon" by Leonard Lipton and Peter Yarrow.  The title character was voiced by Burgess Meredith, and the film also featured the voice of David Mendenhall.  The special first aired May 17, 1982 on CBS.  This was the last "Puff the Magic Dragon" special.

Supporting paragraphs: Puff the Magic Dragon (film) Puff, the Magic Dragon
Answer: Burgess Meredith