Question: is the publication date not in 2009 for Christopher Columbus: The Discovery?
Choices:
yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
Answer: yes
SPARQL: ASK { ?e <pred:name> "Christopher Columbus: The Discovery" . ?e <publication_date> ?pv . ?pv <pred:year> ?v . FILTER ( ?v != 2009 ) .  }
Program:
function: Find
inputs: Christopher Columbus: The Discovery
function: QueryAttr
dependencies: 0
inputs: publication date
function: VerifyYear
dependencies: 1
inputs: 2009
!=