About: http://webisa.webdatacommons.org/448211658

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	According to Wolf, upper-middle-class women sleep much less than lower-class women. (The difference between the top 20 percent and the bottom 20 percent is an hour and a half nightly.) And perhaps they give up sex, as well.
http://www.w3.org/ns/prov#wasQuotedFrom	nybooks.com