Assertion: whistle | /r/HasProperty | powered by an air compressor
Facets:
value: due to the costs
type: CAUSE
value: during the 2010 concert
type: TEMPORAL
Source sentences:
text: The whistle, which is in the Guinness Book of World Records, was powered by an air compressor during the 2010 concert due to the costs of maintaining and running the boiler.