What makes Assassing by Marillion notable?

'Assassing' reached No. 24 on the UK Singles Chart, marking a significant commercial breakthrough for Marillion. The song is notable for its ambitious structure and narrative depth, contributing to the band's reputation as leaders in the progressive rock revival during the 1980s. Released on April 30, 1984, 'Assassing' was Marillion's third single following their successful debut album 'Script for a Jester's Tear'. At this point in their career, the band was solidifying their presence in the neo-prog scene, transitioning from underground success to more mainstream recognition with their unique blend of lyrical storytelling and musical complexity.