Question: Did Ray Charles die from cancer before 1995?
Choices: yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
SPARQL: ASK { ?e <pred:name> "Ray Charles" . ?e <cause_of_death> ?e_1 . ?e_1 <pred:name> "cancer" .  ?e <date_of_death> ?pv . ?pv <pred:year> ?v . FILTER ( ?v < 1995 ) .  }
Program:
function: Find
inputs: cancer
function: Relate
dependencies: 0
inputs: cause of death
backward
function: Find
inputs: Ray Charles
function: And
dependencies: 1
2
function: QueryAttr
dependencies: 3
inputs: date of death
function: VerifyYear
dependencies: 4
inputs: 1995
<
Answer: no