Assertion: smoke detector | /r/HasProperty | invented by george andrew darby
Facets:
value: in england
type: LOCATION
value: in 1902
type: TEMPORAL
Source sentences:
text: Search online and you'll quickly find out that fire alarms were invented by US physicist and mathematician Francis Robbins Upton in 1890, while the first smoke detector was invented by George Andrew Darby in England in 1902.