Assertion: hydrogen sulfide | /r/CapableOf | collect in manhole
Facets:
Source sentences:
text: It collects in low-lying and enclosed, poorly-ventilated areas such as basements, manholes, sewer lines, underground telephone vaults and manure pits.
text: Because it is heavier than air, hydrogen sulfide can collect in low-lying and enclosed spaces, such as manholes, sewers, and underground telephone vaults.