Assertion: prostate cancer's risk | /r/HasProperty | reduced by 20 percent
Facets:
value: for men
type: OTHER
Source sentences:
text: An 18-year Harvard study of nearly 30,000 health professionals determined that risk of prostate cancer was reduced by 20 percent for men who ejaculated 21 times a month, compared to men who ejaculated four to seven times a month.