Simplify the following text for a Grade 9 native English-speaking person.
Original: Two such songs include `` Into the Mystic '' , and `` And the Healing Has Begun '' which were included on the collector 's edition of the soundtrack for the film Once .
Simplified: `` Into the Mystic '' and `` And the Healing Has Begun '' were included on the collector 's edition of the soundtrack for the film Once .