<http://webisa.webdatacommons.org/77616386>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/77616386>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<columbia.edu> .
<http://webisa.webdatacommons.org/77616386>	<http://www.w3.org/ns/prov#value>	"Over centuries and perhaps millennia, farmers have built elaborate irrigation systems that bring water from deep wadi springs to small plots where they grow dates and other crops." .
<http://webisa.webdatacommons.org/prov/177903871>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/77616386> .