Assertion: email | /r/AtLocation | use
Facets:
value: at mit
type: LOCATION
value: by 1980
type: TEMPORAL
value: for 15 years
type: TEMPORAL
Source sentences:
text: Haigh wrote that by 1980, "electronic mail had been in use at MIT for 15 years, Xerox had built a modern, mouse-driven graphical email system for office communication, Compuserve was selling email access to the public, and email had for many years been the most popular application on what was soon to become the Internet.