About: http://webisa.webdatacommons.org/438514991

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	In this short introduction, I try to frame the problem, i.e. the large amounts of error-prone null-checking code we usually have to write in Java, and Introduce the Option monad (Some/None) in Scala, as a solution.
http://www.w3.org/ns/prov#wasQuotedFrom	slideshare.net