Question: Did Harlan Ellison stop working in 2002?
Choices:
yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
Answer: yes
SPARQL: ASK { ?e <pred:name> "Harlan Ellison" . ?e <work_period_(end)> ?pv . ?pv <pred:year> ?v . FILTER ( ?v != 2002 ) .  }
Program:
function: Find
inputs: Harlan Ellison
function: QueryAttr
dependencies: 0
inputs: work period (end)
function: VerifyYear
dependencies: 1
inputs: 2002
!=