Assertion: album's release | /r/MadeOf | one or more albums
Facets:
value: often
type: TEMPORAL
Source sentences:
text: Recording artists who have an extensive back catalogue may re-release several CDs in one single box with a unified design, often containing one or more albums (in this scenario, these releases can sometimes be referred to as a "two (or three)-fer"), or a compilation of previously unreleased recordings.