Assertion: hydrogen's use | /r/CapableOf | evaporate liquid sulfur dioxide
Facets:
value: in order to liquefy carbon dioxide
type: PURPOSE
Source sentences:
text: Using a cascade method, Swiss chemist and physicist Raoul Pierre Pictet evaporated liquid sulfur dioxide in order to liquefy carbon dioxide, which in turn was evaporated to cool oxygen gas enough to liquefy it.