Assertion: opaque projector | /r/HasProperty | marketed as toy
Facets:
value: for children
type: TRANSITIVE-OBJECT
Source sentences:
text: In the early and middle parts of the 20th century, low-cost opaque projectors were produced and marketed as a toy for children.
text: In the early and middle parts of the 20th century, low-cost opaque projectors were produced and marketed as toys for children.