Original sentence: At one point the demo featured lyrics and vocals by Björn titled "Mountain Top", and another instrumental attempt ("Part I") and later reworking "Part 2" (with lead vocals by Agnetha & Frida) was released in the box set Thank You For The Music
Edited sentence: At one point the demo featured lyrics and vocals by Björn titled "Mountain Top", and another instrumental attempt ("Part I") and later reworking "Part 2" (with beautiful lead vocals by Agnetha & Frida) was released in the box set Thank You For The Music