About: http://webisa.webdatacommons.org/17693465

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	50% of tax filing units in the U.S. have no tax liability: I am sure you are just talking about income tax which if you are not poor is the most important tax, But if you are poor, other taxes are much more onerous.
http://www.w3.org/ns/prov#wasQuotedFrom	washingtonpost.com