<http://webisa.webdatacommons.org/221273403>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<mathforum.org> .
<http://webisa.webdatacommons.org/prov/107610811>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/221273403> .
<http://webisa.webdatacommons.org/221273403>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/221273403>	<http://www.w3.org/ns/prov#value>	"are also accessible on mobile devices, especially on tablet PCs." .