Assertion: hydrogen sulfide's concentration | /r/Causes | headache
Facets:
Source sentences:
text: Moderate concentrations can cause more severe eye and respiratory irritation (including coughing, difficulty breathing, accumulation of fluid in the lungs), headache, dizziness, nausea, vomiting, staggering and excitability.
text: Moderate concentrations can cause more severe eye and respiratory irritation, headache, dizziness, nausea, and vomiting.