<http://webisa.webdatacommons.org/421253705>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<rockawave.com> .
<http://webisa.webdatacommons.org/421253705>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/106331986>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/421253705> .
<http://webisa.webdatacommons.org/421253705>	<http://www.w3.org/ns/prov#value>	"In addition to offering proof of your income, the letter is an official document that verifies your Medicare coverage, retirement or disability status, and age." .