<http://webisa.webdatacommons.org/438249976>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/438249976>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<broadinstitute.org> .
<http://webisa.webdatacommons.org/prov/171497274>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/438249976> .
<http://webisa.webdatacommons.org/438249976>	<http://www.w3.org/ns/prov#value>	"One of the challenges of studying cell development, however, is that cells, particularly immune cells, change and evolve over time." .