Assertion: heron | /r/CapableOf | write about pressure
Facets:
value: in this book
type: LOCATION
value: pneumatica
type: OTHER
Source sentences:
text: Pneumatica: in this book, Heron wrote about pressure, and included descriptions of machines such as the siphons, fountains, slot machines, a fire engine, his famous steam driven aeolipile, and a temple-door-opening machine.