About: http://webisa.webdatacommons.org/218625954

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	They???re divided into sections, including vocabulary, writing, and listening.Proofreading: Spelling and Writing is a really nice series of many, many exercises where students have to correct paragraphs.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com