Assertion: wren | /r/HasProperty | appointed professor of astronomy
Facets:
value: at oxford
type: LOCATION
value: at gresham college in london
type: LOCATION
value: in 1657
type: TEMPORAL
Source sentences:
text: In 1657, Wren was appointed professor of astronomy at Gresham College in London.
text: Four years later, he was appointed professor of astronomy at Oxford.