Some context: Usama ibn Mohammed ibn Awad ibn Ladin (Arabic: 'sm@ bn mHmd bn 'wD bn ldn, usamah ibn muhammad ibn 'awad ibn ladin), often anglicized as Osama bin Laden (; March 10, 1957 - May 2, 2011), was a founder of al-Qaeda, the organization responsible for the September 11 attacks in the United States and many other mass-casualty attacks worldwide. He was a Saudi Arabian until 1994 (stateless thereafter), a member of the wealthy bin Laden family, and an ethnic Yemeni Kindite. Bin Laden's father was Mohammed bin Awad bin Laden, a Saudi billionaire from Hadhramaut, Yemen. His mother, Alia Ghanem, was from a secular middle-class family based in Latakia, Syria.
There is no universally accepted standard for transliterating Arabic words and Arabic names into English; however, bin Laden's name is most frequently rendered "Osama bin Laden". The FBI and Central Intelligence Agency (CIA), as well as other U.S. governmental agencies, have used either "Usama bin Laden" or "Usama bin Ladin". Less common renderings include "Ussamah bin Ladin" and, in the French-language media, "Oussama ben Laden". Other spellings include "Binladen" or, as used by his family in the West, "Binladin". The decapitalization of bin is based on the convention of leaving short prepositions, articles, and patronymics uncapitalized in surnames; the nasab bin means "son of". The spellings with o and e come from a Persian-influenced pronunciation also used in Afghanistan, where bin Laden spent many years. Osama bin Laden's full name, Osama bin Mohammed bin Awad bin Laden, means "Osama, son of Mohammed, son of Awad, son of Laden". "Mohammed" refers to bin Laden's father Mohammed bin Laden; "Awad" refers to his grandfather, Awad bin Aboud bin Laden, a Kindite Hadhrami tribesman; "Laden" refers not to bin Laden's great-grandfather, who was named Aboud, but to Aboud's father, Laden Ali al-Qahtani. The Arabic linguistic convention would be to refer to him as "Osama" or "Osama bin Laden", not "bin Laden" alone, as "bin Laden" is a patronymic, not a surname in the Western manner. According to bin Laden's son Omar bin Laden, the family's hereditary surname is "al-Qahtani" (Arabic: lqHTny, al-Qahtani), but bin Laden's father, Mohammed bin Laden, never officially registered the name. Osama bin Laden had also assumed the kunyah "Abu 'Abdallah" ("father of Abdallah"). His admirers have referred to him by several nicknames, including the "Prince" or "Emir" (l'myr, al-Amir), the "Sheik" (lshykh, as-Saykh), the "Jihadist Sheik" or "Sheik al-Mujahid" (shykh lmjhd, Saykh al-Mujahid), "Hajj" (Hj, Hajj), and the "Director". The word usamah ('sm@) means "lion", earning him the nicknames "Lion" and "Lion Sheik".
who was laden Al Qahtani
A: Aboud's father, Laden Ali al-Qahtani.

Some context: Brotherhood of Man are a British pop group who achieved success in the 1970s. They won the 1976 Eurovision Song Contest with "Save Your Kisses for Me". Created in 1969 by songwriter and record producer Tony Hiller, Brotherhood of Man was initially an umbrella title for a frequently-changing line-up of session singers. Early on, they scored a worldwide hit with the song "United We Stand".
Keen to keep the established name alive, Hiller set about putting a new line up together. In 1972 he got together a trio of session singers, Martin Lee, Nicky Stevens and Lee Sheriden. Sheriden was already known to Hiller as a songwriter and had a solo career. Lee had a solo single to his name and was a budding songwriter. Stevens had been classically trained, but had since adapted her vocals and was performing as a cabaret singer. The trio began recording together, but their first single, "Rock Me Baby", to be released at the end of 1972, was cancelled due to the release of the song by David Cassidy. Finally their first two singles "Happy Ever After" and "Our World of Love" were released in 1973. Neither single charted and soon after, another female vocalist was added to the line up, Sandra Stevens. Stevens (no relation to Nicky) had been performing as a big-band singer since a teenager in the late 1960s. She had sung with the Joe Loss big band and alongside Eve Graham (of The New Seekers) in club group, The Nocturnes. Now signed to the Pye spin off label, Dawn, the quartet released their first single, "When Love Catches Up on You" in January 1974. It failed to chart, but the follow-up single, "Lady" became a hit in Europe. Encouraged by this, the group set about recording their debut album. The album Good Things Happening was released later in the year along with two more singles, but none of these found success. Before the record label folded, Brotherhood of Man released one more single in the Summer of 1975. This was the upbeat "Kiss Me Kiss Your Baby" and although failed to make an impression in the UK, became a big hit in Europe, reaching Number one in Belgium and Number two in the Netherlands as well as top 10 placings in other countries. Brotherhood of Man toured extensively in Europe, honing their stage act and harmonies, while Hiller, Sheriden and Lee worked on composing songs for their second album. Among them was a song Sheriden had largely written called "Save Your Kisses for Me".
What happened after the release of the song by David Cassidy?
A:
Finally their first two singles "Happy Ever After" and "Our World of Love" were released in 1973.