Assertion: imperial march | /r/HasProperty | premiered on april
Facets:
value: before the opening of the film
type: TEMPORAL
value: with "yoda's theme"
type: OTHER
Source sentences:
text: Together with "Yoda's Theme", "The Imperial March" was premiered on April 29, 1980, three weeks before the opening of the film, on the occasion of John Williams' first concert as official conductor-in-residence of the Boston Pops Orchestra.