About: http://webisa.webdatacommons.org/105357326

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	However, symptoms such as nausea and vomiting often do not start until several weeks after conception, at which time the neural tube would have closed.
http://www.w3.org/ns/prov#wasQuotedFrom	jamanetwork.com