Assertion: colossus | /r/CapableOf | use vacuum tubes
Facets:
value: to perform boolean operations
type: PURPOSE
Source sentences:
text: It used vacuum tubes, thyratrons and photomultipliers.
text: Colossus used thermionic valves (vacuum tubes and thyratrons) to perform Boolean operations and digital calculations, and some details of its operations could be changed via switches and patch-panel wiring.