Complex sentence: Upon first hearing the song, the man who discovered the band, Alan McGee, claimed that the song was one of the greatest social statements anyone had made in the past 25 years, such was his view on the song.
Split into simpler sentences: Upon first hearing the song; the man who discovered the band, Alan McGee. Claimed that the song was one of the greatest social statements anyone hand made in 25 years, such was his view on the song.