About: http://webisa.webdatacommons.org/132937556

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	Notice there is a space between the -1 and the colon, you need that (or parenthesis) to escape the negative sign.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com