Complex sentence: It was recorded at the same time as their UK debut LP "Three Imaginary Boys" (1979) but not included on the album; however it was later released on the band's US debut "Boys Don't Cry" (1980).
Split into simpler sentences: It was recorded at the same time as their first LP in the UK, "Three Imaginary Boys" (1979) but not included on the album. However it was included on the band's first US album, "Boys Don't Cry" (1980).