Assertion: gregorian chant | /r/ObjectUse | used as the theme music
Facets:
value: often
type: TEMPORAL
Source sentences:
text: A Gregorian chant is often used as the theme music for the Halo Installations in the Halo series, likely alluding to the strong religious connotations they possess for the Covenant, who regard them as relics left behind by their gods, the species that built them.