Assertion: lens | /r/HasProperty | curved piece of glass
Facets:
value: at the simplest level
type: MANNER
value: on the left
type: LOCATION
Source sentences:
text: A lens is a curved piece of glass for viewing, and often magnifying, objects.
text: The lens is the curved plastic bit on the left (the top of the LED that shines toward you.)
text: At the simplest level, a lens is just a curved piece of glass.