Original sentence: After he heard "A Box Full of Sharp Objects", he wanted to get them signed because he believed this band had something no other band had and could change what's happening in the music world.John played the songs for various record executives to try and get them signed, however, the first few weren't interested
Edited sentence: After he heard "A Box Full of Sharp Objects", he wanted to get them signed because he knew this band had something no other band had and could change what's happening in the music world.John played the songs for people trying to get the band signed and the first people he played it for didn't get it and it left John feeling discouraged because he knew this band was like no other