<http://webisa.webdatacommons.org/concept/sum_signal_>	<http://webisa.webdatacommons.org/ontology#hasPreModifier>	"sum" .
<http://webisa.webdatacommons.org/concept/sum_signal_>	<http://webisa.webdatacommons.org/ontology#hasHead>	"signal" .
<http://webisa.webdatacommons.org/concept/sum_signal_>	<http://www.w3.org/2000/01/rdf-schema#label>	"sum signal" .