Assertion: steam engine's boiler | /r/HasProperty | filled with water
Facets:
Source sentences:
text: In a steam engine, fuel such as oil, wood, or coal is used to heat a boiler filled with water.
text: As each boiler filled with water, other firemen would begin lighting the furnaces and tending to the job of bringing the boilers up to operating pressure.
text: After all the boilers were filled with water, the steam from the Donkey boiler would be redirected from the Doctor pump and into the main boilers to speed their coming on line.