Complex sentence: After their music was heard by an executive from record label Warner, the band signed a contract, and released their debut album, "Imaginate" in 1999; this was followed by 2002's "Garage Mahal".
Split into simpler sentences: After their music was heard by an executive from record label Warner, the band signed a contract, and released their debut album, "Imaginate" in 1999. This was followed by 2002's "Garage Mahal".