Assertion: geyser's plumbing system | /r/HasProperty | needed
Facets:
Source sentences:
text: A plumbing system For the heated water to form a geyser, a plumbing system is needed.
text: Finally, a plumbing system is necessary too, but not like pipes in a home.
text: A plumbing system For the heated water to form a geyser, a plumbing system is needed.