Assertion: coaster's car | /r/CapableOf | operate at a speed of 4 mph
Facets:
Source sentences:
text: The train reaches a slight decline that allows the car to roll out and around a 180 degree turnaround and ascends the 30-degree and 85-foot (26 m) chain lift hill, operating at a speed of 4 mph (6.4 km/h).