Assertion: railroad | /r/CapableOf | introduce a duplex steam engine class s1
Facets:
value: in 1939
type: TEMPORAL
Source sentences:
text: In 1939, the largest railroad of the world, the Pennsylvania Railroad introduced a duplex steam engine Class S1, which was designed to be capable of hauling 1200 tons passenger trains at 161 km/h (100 mph).