Question: Was The Polar Express released for Microsoft Windows published before 2001?
Choices: yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
SPARQL: ASK { ?e <pred:name> "The Polar Express" . ?e <platform> ?e_1 . ?e_1 <pred:name> "Microsoft Windows" .  ?e <publication_date> ?pv . ?pv <pred:year> ?v . FILTER ( ?v < 2001 ) .  }
Program:
function: Find
inputs: Microsoft Windows
function: Relate
dependencies: 0
inputs: platform
backward
function: Find
inputs: The Polar Express
function: And
dependencies: 1
2
function: QueryAttr
dependencies: 3
inputs: publication date
function: VerifyYear
dependencies: 4
inputs: 2001
<
Answer: no