Assertion: transistor | /r/HasProperty | invented at bell labs
Facets:
value: on dec.
type: TEMPORAL
Source sentences:
text: Sixty years ago -- on Dec. 16, 1947, to be exact -- the transistor was invented at Bell Labs, igniting a series of changes and advances that would change the way people listen to their favorite music, do their jobs, pay their bills, educate themselves and buy everything from books to used toaster ovens.