Definition: In this task, you're given a context passage, followed by a question that needs to be answered. Based on the paragraph, you must write unambiguous answers to the questions and your answer must refer to a specific phrase from the paragraph. If multiple answers seem to exist, write the answer that is the most plausible.

Positive Example 1 -
Input: Tracy slept awkwardly on their new bed and was having some pain, so Tracy cracked her neck. 
Question: What did Tracy do with her neck?
Output: crack her neck

Positive Example 2 -
Input: The story of the rise of politician Willie Stark from a rural county seat to the governor's mansion is depicted in the film. He goes into politics, railing against the corruptly run county government, but loses his race for county treasurer, in the face of unfair obstacles placed by the local machine. Stark teaches himself law, and as a lawyer, continues to fight the local establishment, championing the local people and gaining popularity. He eventually rises to become a candidate for governor, narrowly losing his first race, then winning on his second attempt. Along the way he loses his innocence and becomes as corrupt as the politicians he once fought against. When his son becomes paralyzed following a drunk driving accident that kills a female passenger, Stark's world starts to unravel and he discovers that not everyone can be bought off. The story has a complex series of relationships. All is seen through the eyes of the journalist, Jack Burden, who admires Stark and even when disillusioned still sticks by him. Stark's campaign assistant, Sadie is clearly in love with Stark and wants him to leave his wife, Lucy. Meanwhile, Stark philanders and gets involved with many women, taking Jack's own girlfriend, Anne Stanton, as his mistress. When Stark's reputation is brought into disrepute by Judge Stanton (Anne's uncle), he seeks to blacken the judge's name. When Jack finds evidence of the judge's possible wrongdoing, a quarter century earlier, he hides it from Stark. Anne gives the evidence to Stark, who uses it against her uncle, who immediately commits suicide. Anne seems to forgive Stark, but her brother, the surgeon who helped save Stark's son's life after the car crash, cannot. The doctor eventually assassinates Stark after Stark wins an impeachment investigation. The doctor in turn is shot down by Sugar Boy, Stark's fawning assistant. The main plot is a thinly disguised version of the rise of real-life 1930s Louisiana Governor, Huey Long, Long's efforts to blacken the name of Judge Benjamin Pavy, and Long's assassination by the Judge's son-in-law (compared to nephew, as in the film), Dr. Carl Weiss. 
Question: What happened to Willie Stark's son?
Output: He was paralyzed in a drunk driving accident.

Negative Example 1 -
Input: tracy wanted to feel safe so she decided to walk behind addison. 
Question: What will happen to Tracy?
Output: appreciate addison

Negative Example 2 -
Input: Tracy told Ash they needed glasses then they accompanied them to the optician for their appointment. 
Question: What does Tracy need to do before this?
Output: know Ash well

Now complete the following example -
Input: By September 1963, Waters and Mason had lost interest in their studies and moved into the lower flat of Stanhope Gardens, owned by Mike Leonard, a part-time tutor at the Regent Street Polytechnic. Waters, Mason and Wright first played music together in late 1963, in a band formed by vocalist Keith Noble and bassist Clive Metcalfe. They usually called themselves Sigma 6, but also used the name the Meggadeaths. Waters played rhythm guitar and Mason played drums, Wright played any keyboard he could arrange to use, and Noble's sister Sheilagh provided occasional vocals. In the early years the band performed during private functions and rehearsed in a tearoom in the basement of Regent Street Polytechnic.When Metcalfe and Noble left to form their own group in September 1963, the remaining members asked Barrett and guitarist Bob Klose to join. Waters switched to the bass and by January 1964, the group became known as the Abdabs, or the Screaming Abdabs. During late 1964, the band used the names Leonard's Lodgers, Spectrum Five, and eventually, the Tea Set. Sometime during late 1965, the Tea Set began calling itself the Pink Floyd Sound, later the Pink Floyd Blues Band and by early 1966, Pink Floyd.By early 1966, Barrett was Pink Floyd's frontman, guitarist, and songwriter. He wrote or co-wrote all but one track of their debut LP The Piper at the Gates of Dawn, released in August 1967. Waters contributed the song "Take Up Thy Stethoscope and Walk" (his first sole writing credit) to the album. By late 1967, Barrett's deteriorating mental health and increasingly erratic behaviour, rendered him "unable or unwilling" to continue in his capacity as Pink Floyd's singer-songwriter and lead guitarist. In early March 1968 Pink Floyd met with managers Peter Jenner and Andrew King of Blackhill Enterprises to discuss the band's future. Barrett agreed to leave Pink Floyd, and the band "agreed to Blackhill's entitlement in perpetuity" regarding "past activities". The band's new manager Steve O'Rourke made a formal announcement about the departure of Barrett and the arrival of David Gilmour in April 1968. 
Question: What is the name of the person who wrote or co-wrote all but one track of the debut LP The Piper at the Gates of Dawn, released in August 1967?
Output: 


Output: Barrett