Assertion: planetarium projector | /r/HasProperty | built by the carl zeiss jena company
Facets:
value: in germany
type: LOCATION
value: between 1925
type: TEMPORAL
value: between 1923
type: TEMPORAL
Source sentences:
text: The first modern planetarium projectors were designed and built by the Carl Zeiss Jena company in Germany between 1923 and 1925, and have since grown more complex.