<http://webisa.webdatacommons.org/concept/year_estimate_>	<http://webisa.webdatacommons.org/ontology#hasHead>	"estimate" .
<http://webisa.webdatacommons.org/concept/year_estimate_>	<http://www.w3.org/2000/01/rdf-schema#label>	"year estimate" .
<http://webisa.webdatacommons.org/concept/year_estimate_>	<http://webisa.webdatacommons.org/ontology#hasPreModifier>	"year" .