Problem: Daniel Lee Dierdorf (born June 29, 1949) is a former American football offensive lineman and current sportscaster. A native of Canton, Ohio, Dierdorf played college football for the University of Michigan from 1968 to 1970 and was selected as a consensus first-team All-American in 1970 and a first-team All-Big Ten Conference player in 1969 and 1970. He was inducted into the University of Michigan Athletic Hall of Honor in 1996 and the College Football Hall of Fame in 2000. Dierdorf played professional football in National Football League (NFL) with the St. Louis Cardinals for 13 seasons from 1971 to 1983.

On September 9, 1979, Dierforf sustained torn ligaments in his left knee during an extra point attempt in the second quarter of the second game of the season against the New York Giants. After the game, Dierdorf said, "The knee was completely out of the socket. It moved a couple of inches off to the side. My leg was all twisted around and my foot was pointing in the wrong direction. It was painful. Very painful." Dierdorf was carried off the field on a stretcher, underwent knee surgery, and missed the remainder of the 1979 season.  Dierdorf returned to the Cardinals in 1980, starting all 16 games for the team at right tackle in both the 1980 and 1981 seasons. In 1980, he was selected to play in the Pro Bowl and was selected as a first-team All-NFL player by the NEA. In 1982, Dierdorf moved to center and was the starter at that position for all nine games in a strike-shortened season.  In 1983, Dierdorf returned to his right tackle position and appeared in seven games, only four as a starter. On October 11, 1983, after the Cardinals began the season with a 1-5 record, Dierdorf announced that he would retire at the end of the 1983 season. At the press conference announcing his retirement, Dierdorf said, "This was an easy decision for me to make. . . . Physically, I just can't play the type of game I want to." He added: "Ninety-five percent of me is sad that I'm retiring, but my knees are very, very happy."

what happened in 1979?

Answer with quotes: On September 9, 1979, Dierforf sustained torn ligaments in his left knee


Problem: Pink Floyd were an English rock band formed in London in 1965. They achieved international acclaim with their progressive and psychedelic music. Distinguished by their use of philosophical lyrics, sonic experimentation, extended compositions, and elaborate live shows, they are one of the most commercially successful and influential groups in popular music history. Pink Floyd were founded by students Syd Barrett on guitar and lead vocals, Nick Mason on drums, Roger Waters on bass and vocals, and Richard Wright on keyboards and vocals.

In 1975, Pink Floyd bought a three-storey group of church halls at 35 Britannia Row in Islington and began converting the building into a recording studio and storage space. In 1976, they recorded their tenth album, Animals, in their newly finished 24-track studio. The concept of Animals originated with Waters, loosely based on George Orwell's political fable, Animal Farm. The album's lyrics described different classes of society as dogs, pigs, and sheep. Hipgnosis received credit for the packaging of Animals; however, Waters designed the final concept, choosing an image of the ageing Battersea Power Station, over which they superimposed an image of a pig.  The division of royalties was a source of conflict between band members, who earned royalties on a per-song basis. Although Gilmour was largely responsible for "Dogs", which took up almost the entire first side of the album, he received less than Waters, who contributed the much shorter two-part "Pigs on the Wing". Wright commented: "It was partly my fault because I didn't push my material ... but Dave did have something to offer, and only managed to get a couple of things on there." Mason recalled: "Roger was in full flow with the ideas, but he was really keeping Dave down, and frustrating him deliberately." Gilmour, distracted by the birth of his first child, contributed little else toward the album. Similarly, neither Mason nor Wright contributed much toward Animals; Wright had marital problems, and his relationship with Waters was also suffering. Animals is the first Pink Floyd album that does not include a writing credit for Wright, who commented: "Animals... wasn't a fun record to make ... this was when Roger really started to believe that he was the sole writer for the band ... that it was only because of him that [we] were still going ... when he started to develop his ego trips, the person he would have his conflicts with would be me."  Released in January 1977, the album peaked on the UK chart at number two, and the US chart at number three. NME described the album as "one of the most extreme, relentless, harrowing and downright iconoclastic hunks of music", and Melody Maker's Karl Dallas called it "[an] uncomfortable taste of reality in a medium that has become in recent years, increasingly soporific".  Pink Floyd performed much of the album's material during their "In the Flesh" tour. It was the band's first experience playing large stadiums, whose size caused unease in the band. Waters began arriving at each venue alone, departing immediately after the performance. On one occasion, Wright flew back to England, threatening to leave the band. At the Montreal Olympic Stadium, a group of noisy and enthusiastic fans in the front row of the audience irritated Waters so much that he spat at one of them. The end of the tour marked a low point for Gilmour, who felt that the band achieved the success they had sought, with nothing left for them to accomplish.

Were there any problems with the band during the making of the album?

Answer with quotes:
Mason recalled: "Roger was in full flow with the ideas, but he was really keeping Dave down, and frustrating him deliberately."