Assertion: linux operating system | /r/HasProperty | conceived at at&t's bell laboratories
Facets:
value: by ken thompson
type: OTHER
value: by dennis ritchie
type: OTHER
value: by joe ossanna
type: OTHER
value: in the united states
type: LOCATION
value: by douglas mcilroy
type: OTHER
Source sentences:
text: The Unix operating system was conceived and implemented in 1969, at AT&T's Bell Laboratories in the United States by Ken Thompson, Dennis Ritchie, Douglas McIlroy, and Joe Ossanna.