Question: Is 1993 not the year that Joshua Jackson's work period started?
Choices:
yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
Answer: yes
SPARQL: ASK { ?e <pred:name> "Joshua Jackson" . ?e <work_period_(start)> ?pv . ?pv <pred:year> ?v . FILTER ( ?v != 1993 ) .  }
Program:
function: Find
inputs: Joshua Jackson
function: QueryAttr
dependencies: 0
inputs: work period (start)
function: VerifyYear
dependencies: 1
inputs: 1993
!=