Question: Is Walter M. Scott's date of birth not in 1987?
Choices:
yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
Answer: yes
SPARQL: ASK { ?e <pred:name> "Walter M. Scott" . ?e <date_of_birth> ?pv . ?pv <pred:year> ?v . FILTER ( ?v != 1987 ) .  }
Program:
function: Find
inputs: Walter M. Scott
function: QueryAttr
dependencies: 0
inputs: date of birth
function: VerifyYear
dependencies: 1
inputs: 1987
!=