Assertion: deep purple | /r/AtLocation | montreux
Facets:
value: to record an album
type: PURPOSE
value: on 4 december
type: TEMPORAL
Source sentences:
text: The lyrics tell a true story: on 4 December 1971, Deep Purple were in Montreux, Switzerland, to record an album using a mobile recording studio (rented from the Rolling Stones and known as the Rolling Stones Mobile Studio—