Assertion: camera's design | /r/HasAspect | basic system of notches
Facets:
value: very
type: DEGREE
value: in a tab on the end
type: LOCATION
value: to indicate film speed
type: PURPOSE
Source sentences:
text: The design of the cassettes had a very basic system of notches in a tab on the end to indicate film speed, but few cameras took advantage of this, and many film cassettes did not even have the required notches.