Assertion: american railroad | /r/CapableOf | use iron
Facets:
value: as an economy measure
type: PURPOSE
value: on top of wooden rails
type: LOCATION
Source sentences:
text: Early North American railroads used iron on top of wooden rails as an economy measure but gave up this method of construction after the iron came loose, began to curl and went into the floors of the coaches.
text: Early North American railroads used iron on top of wooden rails as an economy measure but gave up this method of construction after the iron came loose, began to curl and went into the floors of the coaches.