Assertion: steam engine's steam | /r/CapableOf | move piston
Facets:
value: just ahead of it
type: OTHER
Source sentences:
text: By the mid–sixteenth century, work on air pumps had established the notion of a piston working in a cylinder, and around 1680, French physicist Denis Papin (1647– 1712) put some water at the bottom of a tube, heated it, converted it to steam, and saw that the expanded steam pushed forcibly and moved a piston just ahead of it.