<http://webisa.webdatacommons.org/concept/disease-free+survival_df_>	<http://www.w3.org/2000/01/rdf-schema#label>	"disease-free survival df" .
<http://webisa.webdatacommons.org/concept/disease-free+survival_df_>	<http://webisa.webdatacommons.org/ontology#hasHead>	"df" .
<http://webisa.webdatacommons.org/concept/disease-free+survival_df_>	<http://webisa.webdatacommons.org/ontology#hasPreModifier>	"disease-free survival" .