Assertion: nightmare | /r/HasProperty | opened for def leppard
Facets:
value: at the alpexpo of grenoble
type: LOCATION
value: in 1983
type: TEMPORAL
Source sentences:
text: Nightmare was formed in 1979 and became known when opened for Def Leppard at the Alpexpo of Grenoble in 1983, in front of an audience of more than 4000.