Background: Mastodon is an American heavy metal band from Atlanta, Georgia, formed in 2000. The group is composed of bassist Troy Sanders, guitarists Brent Hinds and Bill Kelliher, and drummer Brann Dailor, all of whom perform vocals in studio (with the exception of Bill Kelliher). They all perform vocals at live shows. Their musical style features progressive concepts and unique instrumentation.
Context: The band's second full-length album, Leviathan, was released in 2004. It is a concept album loosely based on Herman Melville's novel Moby-Dick. The band received critical acclaim for Leviathan and the record was named album of the year by Kerrang! and Terrorizer. "Blood and Thunder" which featured Clutch vocalist Neil Fallon was chosen as one of the most important recordings of the decade by National Public Radio in November 2009, and that the entire album epitomizes " a phenomenal decade for metal". Leviathan also ranked second in a list by Metal Hammer of the best albums of 2004.  The band went on tour in support of the album, playing throughout North America and Europe in The Unholy Alliance tour along with Slayer and Lamb of God and later on with Slipknot.  "Iron Tusk", the fifth track on the album, can be found on the soundtrack of the skateboarding video game Tony Hawk's American Wasteland and in 2K Sports video game NHL 2K9. "Blood and Thunder" is featured in the video games Need for Speed: Most Wanted, Project Gotham Racing 3, and Saints Row. "Blood and Thunder" was added as a playable track on all instruments in Guitar Hero: Metallica and was featured in Japanese music games Drummania V2 and Guitarfreaks V2. It has also been released as downloadable content for Rock Band 3, with Pro Guitar support also available at extra cost.  Leviathan was followed by the 2006 release of Call of the Mastodon, a remastered collection of the band's first nine songs, and a DVD of interviews and concert footage called The Workhorse Chronicles that includes material from the band's early days as a five-piece. The band has stated that "Call of the Mastodon" is their third studio album even though the album is a compilation album. These two releases were the band's last for Relapse Records, as they would later go on to sign with Warner Bros. Mastodon also recorded a cover version of Metallica's "Orion" for a 2006 Kerrang! tribute album marking the twentieth anniversary of the release of Master of Puppets.
Question: Did they collaborate with any other artists?
Answer: Blood and Thunder" which featured Clutch vocalist Neil Fallon

Background: Jo Elizabeth Stafford (November 12, 1917 - July 16, 2008) was an American traditional pop music singer and occasional actress, whose career spanned five decades from the late 1930s to the early 1980s. Admired for the purity of her voice, she originally underwent classical training to become an opera singer before following a career in popular music, and by 1955 had achieved more worldwide record sales than any other female artist. Her 1952 song "You Belong to Me" topped the charts in the United States and United Kingdom, the record becoming the first by a female artist to reach number one on the U.K. Singles Chart.
Context: While Stafford was still working for Dorsey, Johnny Mercer told her, "Some day I'm going to have my own record company, and you're going to record for me." She subsequently became the first solo artist signed to Capitol after leaving the Pied Pipers in 1944. A key figure in helping Stafford to develop her solo career was Mike Nidorf, an agent who first heard her as a member of the Pied Pipers while he was serving as a Captain with the United States Army. Having previously discovered artists such as Glenn Miller, Artie Shaw, and Woody Herman, Nidorf was impressed by Stafford's voice, and contacted her when he was demobilized in 1944. After she agreed to let him represent her, he encouraged her to reduce her weight and arranged a string of engagements that raised her profile, and confidence.  The success of Stafford's solo career led to a demand for personal appearances, and from February 1945 she embarked on a six-month residency at New York's La Martinique nightclub. Her performance was well-received--an article in the July 1945 edition of Band Leaders magazine described it as "sensational"--but Stafford did not enjoy singing before live audiences, and it was the only nightclub venue she ever played. Speaking about her discomfort with live performances, Stafford told a 1996 interview with The New Yorker's Nancy Franklin, "I'm basically a singer, period, and I think I'm really lousy up in front of an audience--it's just not me."  Stafford's tenure with the United Service Organizations (USO) during World War II--which often saw her perform for soldiers stationed in the U.S.--led to her acquiring the nickname "G.I. Jo". On returning from the Pacific theater, a veteran told Stafford that the Japanese would play her records on loudspeakers in an attempt to make the U.S. troops homesick enough to surrender. She replied personally to all the letters she received from servicemen. Stafford was a favorite of many servicemen during both World War II and the Korean War; her recordings received extensive airplay on the American Forces radio and in some military hospitals at lights-out. Stafford's involvement with servicemen led to an interest in military history and a sound knowledge of it. Years after World War II, Stafford was a guest at a dinner party with a retired naval officer. When the discussion turned to a wartime action off Mindanao, the officer tried to correct Stafford, who held to her point. He countered her by saying, "Madame, I was there". A few days after the party, Stafford received a note of apology from him, saying he had re-read his logs and that she was correct.
Question: Did they have Children while in the organization?
Answer: