Question: Was goth rocker Robert Smith born prior to 1898 ?
Choices: yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
SPARQL: ASK { ?e <pred:name> "Robert Smith" . ?e <genre> ?e_1 . ?e_1 <pred:name> "gothic rock" .  ?e <date_of_birth> ?pv . ?pv <pred:year> ?v . FILTER ( ?v < 1898 ) .  }
Program:
function: Find
inputs: gothic rock
function: Relate
dependencies: 0
inputs: genre
backward
function: Find
inputs: Robert Smith
function: And
dependencies: 1
2
function: QueryAttr
dependencies: 3
inputs: date of birth
function: VerifyYear
dependencies: 4
inputs: 1898
<
Answer: no