Assertion: spectacle's lense | /r/HasProperty | developed by william h. armistead
Facets:
value: in the 1960s
type: TEMPORAL
value: at the corning glass works inc.
type: LOCATION
Source sentences:
text: Photochromic lenses were developed by William H. Armistead and Stanley Donald Stookey at the Corning Glass Works Inc. in the 1960s, and the process was used in the first mass-produced variable tint lenses.