Question: Did Jon Stone not die in 1639?
Choices:
yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
Answer: yes
SPARQL: ASK { ?e <pred:name> "Jon Stone" . ?e <date_of_death> ?pv . ?pv <pred:year> ?v . FILTER ( ?v != 1639 ) .  }
Program:
function: Find
inputs: Jon Stone
function: QueryAttr
dependencies: 0
inputs: date of death
function: VerifyYear
dependencies: 1
inputs: 1639
!=