<http://caligraph.org/ontology/Mobile_phone_introduced_in_the_2020s>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Mobile_phone_introduced_in_the_21st_century> .
<http://caligraph.org/ontology/Mobile_phone_introduced_in_the_2010s>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Mobile_phone_introduced_in_the_21st_century> .
<http://caligraph.org/ontology/Mobile_phone_introduced_in_the_2000s>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Mobile_phone_introduced_in_the_21st_century> .
<http://caligraph.org/ontology/Mobile_phone_introduced_in_the_21st_century>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Mobile_phones_introduced_in_the_21st_century> .
<http://caligraph.org/ontology/Mobile_phone_introduced_in_the_21st_century>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Class> .
<http://caligraph.org/ontology/Mobile_phone_introduced_in_the_21st_century>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Mobile_phone> .
<http://caligraph.org/ontology/Mobile_phone_introduced_in_the_21st_century>	<http://www.w3.org/2000/01/rdf-schema#label>	"Mobile phone introduced in the 21st century" .