Question:
Yusuf Islam (born Steven Demetre Georgiou; 21 July 1948), commonly known by his former stage name Cat Stevens, is a British singer-songwriter and multi-instrumentalist. His 1967 debut album reached the top 10 in the UK, and the album's title song "Matthew and Son" charted at number 2 on the UK Singles Chart. Stevens' albums Tea for the Tillerman (1970) and Teaser and the Firecat (1971) were both certified triple platinum in the US by the RIAA. His musical style consists of folk, pop, rock, and Islamic music.
Immediately following the September 11 attacks on the United States, he said:  I wish to express my heartfelt horror at the indiscriminate terrorist attacks committed against innocent people of the United States yesterday. While it is still not clear who carried out the attack, it must be stated that no right-thinking follower of Islam could possibly condone such an action. The Qur'an equates the murder of one innocent person with the murder of the whole of humanity. We pray for the families of all those who lost their lives in this unthinkable act of violence as well as all those injured; I hope to reflect the feelings of all Muslims and people around the world whose sympathies go out to the victims of this sorrowful moment.  He appeared on videotape on a VH1 pre-show for the October 2001 Concert for New York City, condemning the attacks and singing his song "Peace Train" for the first time in public in more than 20 years, as an a cappella version. He also donated a portion of his box-set royalties to the fund for victims' families, and the rest to orphans in underdeveloped countries. During the same year, he dedicated time and effort in joining the Forum Against Islamophobia and Racism, an organisation that worked towards battling misconceptions and acts against others because of their religious beliefs or their racial identity (or both), after many Muslims reported a backlash against them due in part to the grief caused by the events in the United States on 11 September.
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What is significant about September 11 for Cat Stevens?

Answer:
He appeared on videotape on a VH1 pre-show for the October 2001 Concert for New York City, condemning the attacks and singing his song "Peace Train


Question:
Cosby was born on July 12, 1937 in Philadelphia, Pennsylvania. He is one of four sons of Anna Pearl (nee Hite), a maid, and William Henry Cosby Sr., who served as a mess steward in the U.S. Navy. During much of Cosby's early childhood, his father was away from home in Navy service and especially during WWII. As a student, he described himself as a class clown.
Cosby left Temple to pursue a career in comedy. He lined up standup jobs at clubs in Philadelphia and then in New York City, where he appeared at The Gaslight Cafe beginning in 1961. He booked dates in cities such as Chicago, Las Vegas, San Francisco, and Washington, D.C. In the summer of 1963, he received national exposure on NBC's The Tonight Show. This led to a recording contract with Warner Bros. Records, who, in 1964, released his debut LP Bill Cosby Is a Very Funny Fellow...Right!, the first of a series of comedy albums. His album To Russell, My Brother, Whom I Slept With was number 1 on Spin Magazines list of "The 40 Greatest Comedy Albums of All Time", calling it "stand-up comedy's masterpiece".  While many comics of the time were using the growing freedom of that decade to explore material that was controversial and sometimes risque, Cosby was making his reputation with humorous recollections of his childhood. Many Americans wondered about the absence of race as a topic in Cosby's stories. As Cosby's success grew he had to defend his choice of material regularly; as he argued, "A white person listens to my act and he laughs and he thinks, 'Yeah, that's the way I see it too.' Okay. He's white. I'm Negro. And we both see things the same way. That must mean that we are alike. Right? So I figure this way I'm doing as much for good race relations as the next guy."  In 1983, he released the concert film Bill Cosby: Himself; it is widely regarded as "the greatest comedy concert film ever". Younger, well-established comics like Jerry Seinfeld have credited Cosby as an innovator both as a practitioner of the genre of standup comedy, as well as a person who paved the way for comics to break into sitcom television. Seinfeld said of Cosby: "He opened a door for all of us, for all of the networks to even consider that this was a way to create a character, was to take someone who can hold an audience just by being up there and telling their story. He created that. He created the whole idea of taking a quote-unquote 'comic' and developing a TV show just from a persona that you see on stage." Comedian Larry Wilmore also saw a connection between Bill Cosby: Himself and the later success of The Cosby Show, saying: "It's clear that the concert is the template for The Cosby Show."  Cosby performed his first TV standup special in 30 years, "Bill Cosby: Far From Finished", on Comedy Central on November 23, 2013. Cosby's last show of the "Far From Finished" tour was performed at the Cobb Energy Performing Arts Centre in Atlanta, Georgia on May 2, 2015.  In 2014, Cosby was set to release his new standup special Bill Cosby 77 on Netflix. The release of the film was canceled due to allegations of sexual assault.
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Did he perform on tv?

Answer:
Cosby performed his first TV standup special in 30 years,