Problem: Background: Bananarama is a British female pop music vocal group formed in London in 1981 by friends Sara Dallin, Siobhan Fahey and Keren Woodward. Their success on both pop and dance charts has earned them a listing in the Guinness World Records as the all-female group with the most chart entries in the world. In addition to their chart success, they are also known for their vocal style, generally singing in unison rather than in harmony like most vocal groups. The group's 10 UK Top 10 hits include "It Ain't What You Do..." (1982), "Really Saying Something" (1982), "Shy Boy" (1982), "Cruel Summer" (1983), "Robert De Niro's Waiting..." (1984) and "Love in the First Degree" (1987).
Context: Bananarama were founded in London in 1981 by Fahey, Woodward and Dallin, the latter two having been childhood friends in Bristol since the age of four, and attending St. George's School for Girls together. Dallin and Fahey met in 1979 while studying fashion journalism at the London College of Fashion. They became friends because they both dressed more radically than the other students. The trio were ardent followers of the punk rock and post-punk music scene during the late 1970s and early 1980s and often performed impromptu sets or backing vocals at gigs for such bands as The Monochrome Set, Iggy Pop, The Jam, Department S and The Nipple Erectors.  In 1981, Bananarama's members were living above the rehearsal room that was used by former Sex Pistols members Steve Jones and Paul Cook. With their help, Bananarama recorded their first demo "Aie a Mwana" (UK #92, a cover of a song by Black Blood, sung in Swahili). The demo was heard at Demon Records, who consequently offered Bananarama their first deal. The song was an underground hit and Bananarama were signed by Decca (later London Records) and remained on the label until 1993.  During this early period Bananarama were approached by Malcolm McLaren, who offered to manage the group. McLaren, manager of the Sex Pistols and Bow Wow Wow, and notorious for generating scandal, proposed some new material that was sexually suggestive, and did not fit with what at the time was the band's tomboyish and straightforward image. Bananarama passed on both the material and McLaren as their manager.  UK fashion magazine The Face featured an article on Bananarama after the release of their first single. This caught the attention of ex-Specials member Terry Hall, who invited them to collaborate with his new vocal group Fun Boy Three on the track "It Ain't What You Do It's The Way That You Do It". In 1982, the song hit the Top 5 in the UK and gave Bananarama their first significant mainstream success. Fun Boy Three then guest starred on Bananarama's single, "Really Saying Something", later that year.
Question: When did they start writing music on more serious topics?
Answer: 

Background: The Moody Blues are an English rock band formed in Birmingham, England in 1964. They first came to prominence playing rhythm and blues music, but their second album, Days of Future Passed, which was released in 1967, was a fusion of rock with classical music and established them as pioneers in the development of art rock and progressive rock. It has been described as a "landmark" and "one of the first successful concept albums". The band became known internationally with singles including "Go Now", "Nights in White Satin", "Tuesday Afternoon", and "Question".
Context: For their next two albums, Every Good Boy Deserves Favour (1971) - from which Hayward's "The Story in Your Eyes" was taken as a US charting single (No. 23) - and Seventh Sojourn (1972) (which reached No. 1 in the US), the band returned to their signature orchestral sound which, while difficult to reproduce in concert, had become their trademark. The title "Every Good Boy Deserves Favour" was borrowed, tongue-in-cheek, from a mnemonic used to remember the musical notes that form the lines of the treble clef: EGBDF. The opening track "Procession" was the only item composed by all five band members, a fascinating track depicting the "evolution" of music, leading into Hayward's "Story in Your Eyes". Thomas's reflective "Our Guessing Game" and whimsical "Nice To Be Here" offset the deeper drama of Hayward's "You Can Never Go Home", Lodge's "One More Time To Live" and Pinder's "My Song". Edge, the long-standing drummer-poet, started writing lyrics intended to be sung, rather than verses to be spoken - his "After You Came" (1971) featured each of the four lead singers taking a vocal section. Then in 1972, Lodge's songs "Isn't Life Strange?" (No. 13) and "I'm Just a Singer (In a Rock and Roll Band)" (No. 36) were lifted from Seventh Sojourn as charting UK singles. Sojourn also saw Pinder using the new Chamberlin instrument in place of the mellotron and Edge using an electronic drum kit. Pinder's stirring lament "Lost in a Lost World" opened this last "Core Seven" outing, while his sympathetic ode to Timothy Leary "When You're a Free Man", Thomas's romantic "For My Lady", and Hayward's serene "New Horizons" all stood out.  In an interview following the release of Seventh Sojourn, Graeme Edge told Rolling Stone: "We've got two Christians, one Mystic, one Pedantic and one Mess, and we all get on a treat."  By this time, other bands were picking up their work. Pinder's songs "A Simple Game" (1968) and "So Deep Within You" (1969) were successfully covered by the Four Tops, Pinder winning an Ivor Novello Award for "A Simple Game", Elkie Brooks later covered Hayward's "Nights in White Satin". Pinder also appeared on John Lennon's "Imagine" album in 1971, providing additional percussion on "I Don't Wanna Be a Soldier (I Don't Want to Die)". The 1968 to 1972 album sleeves, plus several solo sets up to Ray Thomas's "Hopes, Wishes & Dreams" in 1976, were characterised by striking surreal scenic sleeve artwork (mostly gatefold sleeves) by artist Phil Travers.  In late 1972, a re-issue of the five-year-old "Nights in White Satin" became the Moody Blues' biggest US hit, soaring to number two on the Billboard Hot 100 and becoming a certified million-seller; the song had "bubbled under" the Hot 100 charts on its original release. The song also returned to the UK charts, reaching No. 9, ten places higher than its original release in 1967.
Question: Did they perform with any other artists?
Answer:
". Pinder also appeared on John Lennon's "Imagine" album in 1971,