Assertion: du spectrophotometer | /r/HasProperty | essential
Facets:
Source sentences:
text: DU spectrophotometer was essential" --> is this a subtype or so?
text: DU spectrophotometer was essential" --> is this a subtype or so?
text: DU spectrophotometer was essential" --> is this a subtype or so?
text: DU spectrophotometer was essential" --> is this a subtype or so?