About: http://webisa.webdatacommons.org/166881068

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	This is because you use f[t] and so on instead of the expression itself (Sin is a function but x^2 is just an expression).
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com