<http://webisa.webdatacommons.org/prov/499381014>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/170444930> .
<http://webisa.webdatacommons.org/170444930>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/170444930>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<wisegeek.org> .
<http://webisa.webdatacommons.org/170444930>	<http://www.w3.org/ns/prov#value>	"When tissues or other body parts are damaged, they generally give off chemical substances known as ???second messengers.??? Important second messengers include bradykinin, prostaglandins, histamine, serotonin, leukotrienes, and potassium." .