Assertion: gas | /r/CapableOf | happen among human
Facets:
value: accidentally
type: MANNER
value: occasionally
type: DEGREE
Source sentences:
text: Among humans, flatulence occasionally happens accidentally, such as incidentally to coughing or sneezing or during orgasm; on other occasions, flatulence can be voluntarily elicited by tensing the rectum or "bearing down" on stomach or bowel muscles and subsequently relaxing the anal sphincter, resulting in the expulsion of flatus.