<http://caligraph.org/resource/Roberts_Filter_Group>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://caligraph.org/ontology/Privately_held_company_based_in_Pennsylvania> .
<http://caligraph.org/resource/Roberts_Filter_Group>	<http://caligraph.org/ontology/type>	<http://caligraph.org/resource/Privately_held_company> .
<http://caligraph.org/resource/Roberts_Filter_Group>	<http://caligraph.org/ontology/foundingYear>	"1889" .
<http://caligraph.org/resource/Roberts_Filter_Group>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Manufacturing_companies_established_in_1889> .
<http://caligraph.org/resource/Roberts_Filter_Group>	<http://caligraph.org/ontology/product>	<http://caligraph.org/resource/Lamella_clarifier> .
<http://caligraph.org/resource/Roberts_Filter_Group>	<http://www.w3.org/2004/02/skos/core#prefLabel>	"Roberts Filter Group" .
<http://caligraph.org/resource/Roberts_Filter_Group>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://caligraph.org/ontology/1889_establishment_in_Pennsylvania> .
<http://caligraph.org/resource/Roberts_Filter_Group>	<http://caligraph.org/ontology/product>	<http://caligraph.org/resource/Sedimentation_(water_treatment)> .
<http://caligraph.org/resource/Roberts_Filter_Group>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:1889_establishments_in_Pennsylvania> .
<http://caligraph.org/resource/Roberts_Filter_Group>	<http://www.w3.org/2000/01/rdf-schema#label>	"Roberts Filter Group" .
<http://caligraph.org/resource/Roberts_Filter_Group>	<http://caligraph.org/ontology/product>	<http://caligraph.org/resource/Carbon_filtering> .
<http://caligraph.org/resource/Roberts_Filter_Group>	<http://www.w3.org/2002/07/owl#sameAs>	<http://dbpedia.org/resource/Roberts_Filter_Group> .
<http://caligraph.org/resource/Roberts_Filter_Group>	<http://caligraph.org/ontology/product>	<http://caligraph.org/resource/Ion_exchange> .
<http://caligraph.org/resource/Roberts_Filter_Group>	<http://caligraph.org/ontology/product>	<http://caligraph.org/resource/Backwashing_(water_treatment)> .
<http://caligraph.org/resource/Roberts_Filter_Group>	<http://caligraph.org/ontology/product>	<http://caligraph.org/resource/Water_filter> .
<http://caligraph.org/resource/Roberts_Filter_Group>	<http://caligraph.org/ontology/industry>	<http://caligraph.org/resource/Water_filter> .
<http://caligraph.org/resource/Roberts_Filter_Group>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#NamedIndividual> .
<http://caligraph.org/resource/Roberts_Filter_Group>	<http://caligraph.org/ontology/location>	<http://caligraph.org/resource/Pennsylvania> .
<http://caligraph.org/resource/Roberts_Filter_Group>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://caligraph.org/ontology/Company_based_in_Delaware_County,_Pennsylvania> .
<http://caligraph.org/resource/Roberts_Filter_Group>	<http://caligraph.org/ontology/product>	<http://caligraph.org/resource/Dissolved_air_flotation> .
<http://caligraph.org/resource/Roberts_Filter_Group>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://caligraph.org/ontology/Manufacturing_company_established_in_1889> .
<http://caligraph.org/resource/Roberts_Filter_Group>	<http://caligraph.org/ontology/product>	<http://caligraph.org/resource/Rapid_sand_filter> .
<http://caligraph.org/resource/Roberts_Filter_Group>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Companies_based_in_Delaware_County,_Pennsylvania> .
<http://caligraph.org/resource/Roberts_Filter_Group>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Privately_held_companies_based_in_Pennsylvania> .