Complex sentence: "Down" is a dancehall-influenced song that uses snare drums, synthesizers and percussion as its instrumentation, the song contains featured vocals by rapper Gucci Mane duringbthe bridge, it's the only track presents in the album that contains a guest appearance.
Split into simpler sentences: Down is a dancehall-influenced song that uses snare drums, synthesizers and percussion. The song song contains an additional rapped verse by Gucci Mane during the bridge, it's the only track presents in the album that contains a guest appearance.