About: http://webisa.webdatacommons.org/35817780

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	But to guess why they were originally different -- it is probably a really good idea to have different types for numerical data and letters, even if their contents work exactly the same way, just to avoid getting them mixed up.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com