Question: Hideto Matsumoto (Song Ben Xiu Ren , Matsumoto Hideto, December 13, 1964 - May 2, 1998), better known by his stage name hide, was a Japanese musician, singer and songwriter. He is primarily known for his work as lead guitarist of the heavy metal band X Japan.

hide was born in St. Joseph's Hospital in Midorigaoka, Japan, on December 13, 1964 and went on to attend Yokosuka Tokiwa Junior High School. He was first exposed to rock music at the age of fifteen, through the album Alive! by Kiss. That same year his grandmother bought him his first electric guitar, a Gibson Les Paul Deluxe. On March 11, 1980, hide graduated from Tokiwa Junior High School. He then entered Zushi Kaisei Senior High School in Zushi, Kanagawa, where he entered the school's brass band as a club activity. He quit the band after a short time because he was assigned the clarinet while he wanted to play the trumpet. After this, he concentrated on guitar and in 1981 formed the band Saber Tiger. A year after their founding, they started playing shows at live houses in Yokosuka, such as Rock City. In April 1983 he started studying cosmetology and fashion at the Hollywood University of Beauty and Fashion in present-day Roppongi Hills, from which he graduated in 1984. Later that year he took a nationwide examination and successfully obtained a beautician license. In July 1985 Saber Tiger released their self-titled EP, which included two songs, "Double Cross" and "Gold Digger". In November, the band contributed the song "Vampire" to the Heavy Metal Force III sampler, which also included songs by X and Jewel. Years later, Jewel's guitarist Kiyoshi would join hide's solo band. In 1986 the group changed its name to Saver Tiger to avoid confusion with a similarly named band from Sapporo (see Saber Tiger). Their first appearance with the new name was on the sampler Devil Must Be Driven out with Devil, with their songs "Dead Angle" and "Emergency Express". They continued to perform in live houses and night clubs such as Meguro Rokumeikan, Omiya Freaks and Meguro Live Station. Until January 28, 1987, when hide became tired of changing members and decided to end the band (vocalist Kyo and drummer Tetsu would both go on to D'erlanger). Around the same time hide was invited to join X. In 2001, Nippon Crown issued a three-volume release titled Origin of hide, with the band credited as "Yokosuka Saver Tiger". Volumes 1 and 2 were live CDs, with some rehearsal recordings, while volume 3 was a concert VHS.

Using a quote from the above article, answer the following question: When did he join Saver Tiger?
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Answer: he concentrated on guitar and in 1981 formed the band Saber Tiger.

Question: Enrique Martin Morales (born December 24, 1971), commonly known as Ricky Martin, is a Puerto Rican singer, actor and author. Martin began his career at age 12 with the all-boy pop group Menudo. After five years with the group, he released several Spanish-language solo albums throughout the 1990s. He also acted on stage and on TV in Mexico, where he achieved modest stardom.

After receiving commercial success throughout Asia, Europe, and Latin America, Martin prepared his first English album in 1999 in an attempt to cross over to the United States market. The self-titled album, which debuted at number one on the Billboard 200 and sold 661,000 copies in its first week of release, became the most successful album debut on the Billboard charts by a Hispanic artist. It contained material by writers and producers such as Desmond Child, Diane Warren, William Orbit, George Noriega and his longtime childhood friend Draco Rosa. The album also featured special guests: Madonna on the Spanish-English duet "Be Careful (Cuidado con mi Corazon)" and Meja on "Private Emotion". Two weeks after the album's release, Martin was featured on the cover of Time with the title "Latin Music Goes Pop!". Before the album's release, Janet Jackson collaborated with Ricky Martin for the Latin American version of "Ask for More", a promotional single and commercial released as part of an advertising campaign for soft drink company Pepsi. The first and most prominent single was "Livin' la Vida Loca", which reached number one in many countries around the world, including the United States, United Kingdom, Canada, Ireland and New Zealand. "Livin' la Vida Loca" is Ricky Martin's biggest hit. The video for "Livin 'La Vida Loca" was directed by Wayne Isham and starring model Nina Moric. It was followed by "She's All I Ever Had" which peaked at number two on the Billboard Hot 100. Both tracks peaked at number one on the Hot Latin Songs. "Livin' la Vida Loca" is generally seen as the song that began the Latin pop explosion of 1999 and made the transition of other Latin artists (first Jennifer Lopez and Enrique Iglesias, then later Shakira) into the English-speaking market easier. Ricky Martin became one of the top-selling albums of 1999, and was certified 7x platinum in the United States, selling over 22 million copies worldwide. In October 1999, Martin embarked on a very successful year-long Livin' la Vida Loca Tour. After this success, a new English-language album, Sound Loaded, was released in November 2000. It debuted at number four on the Billboard 200 and was certified 2x platinum by the RIAA. "She Bangs" and "Nobody Wants to Be Lonely" (duet with Christina Aguilera) peaked at number twelve and thirteen on the Billboard Hot 100, respectively. Both singles reached number one on the Hot Latin Songs. Sound Loaded has sold over 8 million copies worldwide. In February 2001, Martin released a Spanish greatest hits album entitled La Historia, which went to number one for five weeks on the Billboard Top Latin Albums and debuted at number eighty-three on the Billboard 200. It also topped the chart in Sweden for three weeks. The album contained reworkings of two of his early songs "Fuego Contra Fuego" and "El Amor de Mi Vida". In November 2001, an English-language greatest hits album, The Best of Ricky Martin was released outside North America. It contained two new remixes of "Amor".

Using a quote from the above article, answer the following question: Was anyone featureed
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Answer:
The album also featured special guests: Madonna on the Spanish-English duet "Be Careful (Cuidado con mi Corazon)" and Meja on "Private Emotion