Background: John Michael Stipe (born January 4, 1960) is an American musician and singer-songwriter. He is best known as the lead singer and main lyricist of the alternative rock band R.E.M. from their formation in 1980 until their dissolution in 2011. Possessing a distinctive voice, Stipe is noted for the "mumbling" style of his early career as well as for his social and political activism. He was in charge of R.E.M.'s visual aspect, often selecting album artwork and directing many of the band's music videos.
Context: While attending college at the University of Georgia in Athens, Stipe frequented the Wuxtry record shop, where he met store clerk Peter Buck in 1980. "He was a striking-looking guy and he also bought weird records, which not everyone in the store did", Buck recalled. The two became friends and eventually decided to form a band. Buck and Stipe started writing music together; at the time Stipe also spent time in a local group named Gangster. The pair were soon joined by Bill Berry and Mike Mills and named themselves R.E.M., a name Stipe selected at random from a dictionary.  All four members of R.E.M. dropped out of school in 1980 to focus on the band. Stipe was the last to do so. The band issued its debut single, "Radio Free Europe", on Hib-Tone, which was a college radio success. The band signed to I.R.S. Records for the release of the Chronic Town EP one year later. R.E.M. released its debut album Murmur in 1983, which was acclaimed by critics. Stipe's vocals and lyrics received particular attention from listeners. Murmur went on to win the Rolling Stone Critics Poll Album of the Year over Michael Jackson's Thriller. Their second album, Reckoning, followed in 1984.  In 1985, R.E.M. traveled to England to record their third album Fables of the Reconstruction, a difficult process that brought the band to the verge of a break up. After the album was released, relationships in the band remained tense. Gaining weight and acting eccentrically (such as by shaving his hair into a monk's tonsure), Stipe later said of the period, "I was well on my way to losing my mind". They toured in Canada and throughout Europe that year; Stipe had bleached his hair blond during this time.
Question: What was there first single?
Answer: The band issued its debut single, "Radio Free Europe", on Hib-Tone,

Background: Helloween are a German power metal band founded in 1984 in Hamburg, Northern Germany by members of bands Iron Fist and Gentry. Its first line-up consisted of singer and rhythm guitarist Kai Hansen, bass guitarist Markus Grosskopf, lead guitarist Michael Weikath, and drummer Ingo Schwichtenberg. After the release of a self-titled EP and their debut album Walls of Jericho in 1985, it expanded into a quintet with the addition of singer Michael Kiske, Hansen choosing to focus on guitar instead. Under this line-up, they released the Keeper of the Seven Keys albums (1987 and 1988), which established Helloween as a notable heavy metal band and led to the creation of the power metal subgenre.
Context: The year 2000 saw the release of The Dark Ride, a more experimental and darker album than their previous releases. It came complete with downtuned guitars and a gruffer singing style from Deris. Immediately following the tour, Helloween parted ways with guitarist Roland Grapow and drummer Uli Kusch. One version of events states that Weikath, Deris, and Grosskopf felt that Kusch and Grapow, in particular, were spending more time on and paying more attention to their new side-project, Masterplan (Grapow's output on Helloween albums had dropped to barely one song per album by that point); since the others believed that Kusch and Grapow were not one hundred percent dedicated to Helloween, they were dismissed.  They were replaced by guitarist Sascha Gerstner (ex-Freedom Call, Neumond) and drummer Mark Cross (ex-Metalium, Kingdom Come, At Vance, Firewind), culminating with the recording of another studio album, titled Rabbit Don't Come Easy, in 2003. The band met Sascha via a recommendation by producer Charlie Bauerfeind. According to Grosskopf, one day he was recording something with Freedom Call "and later on we called him up and he went to first meet Weiki because it was very important that Weiki finds a player that he can play with and also communicate and understand. [...] So we got him on the island where we recorded and let him hang out with us a little and then he decided 'Good, let's go'." Later in 2012, on an interview with Metal Shock Finland's Chief Editor, Mohsen Fayyazi, Roland stated:  Cross could not finish the album due to mononucleosis, completing only two tracks; the drum tracks were completed by Motorhead's Mikkey Dee. Stefan Schwarzmann, former drummer of Running Wild and Accept would shortly thereafter take over the drumming duties. Despite a somewhat tepid response to the album, Helloween nonetheless completed a successful world tour, highlighted by the return of classic songs such as "Starlight", "Murderer", "Keeper of the Seven Keys" and "How Many Tears" to the setlist. Additionally, the band toured the United States for the first time since 1989, playing to sold-out crowds at nearly every venue.
Question: Who was replaced during this time period?
Answer:
the others believed that Kusch and Grapow were not one hundred percent dedicated to Helloween, they were dismissed.