Original sentence: "Smoke on the Water" is a famous and influential rock song by Deep Purple.On the eve of the recording session a concert featuring Frank Zappa and the Mothers of Invention was held in the casino's theater; during the concert a fire broke out (said to be caused by a Swedish fan shooting a flare gun in the ceiling) that eventually destroyed the entire casino complex, along with all  the Mothers' equipment.The song is known for and recognizable by its central theme, a crunching four-tone chromatic progression that is perhaps the single most famous riff in heavy metal music history.The song's structure takes a contrasting verse-chorus form, with the driving verse sections building musical tension while the soaring chorus releases it
Edited sentence: "Smoke on the Water" is a famous and influential rock song by Deep Purple featuring contrasting verse-chorus form.All  the Mothers' equipment was lost in the fire.On the eve of the recording session a concert featuring Frank Zappa and the Mothers of Invention was held in the casino's theater; during the concert a fire broke out (said to be caused by a Swedish fan shooting a flare gun in the ceiling) that eventually destroyed the entire casino complex.The song is immediately recognizable by its central theme, a crunching four-tone chromatic progression that is perhaps the single most famous riff in heavy metal music history