About: http://webisa.webdatacommons.org/62402980

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	Dear Hung Nguyen: Thanks for the explanation, though I am a bit puzzled as to why your friend thinks that the class of subgroups as in your question is a natural one.
http://www.w3.org/ns/prov#wasQuotedFrom	mathoverflow.net