Question: Was Leon Russell born before 1942?
Choices: yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
SPARQL: ASK { ?e <pred:name> "Leon Russell" . ?e <date_of_birth> ?pv . ?pv <pred:year> ?v . FILTER ( ?v < 1942 ) .  }
Program:
function: Find
inputs: Leon Russell
function: QueryAttr
dependencies: 0
inputs: date of birth
function: VerifyYear
dependencies: 1
inputs: 1942
<
Answer: no