Question: Is the date of birth of a person known for vocal music, 18th November 1977?
Choices: yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
SPARQL: ASK { ?e <pred:instance_of> ?c . ?c <pred:name> "human" . ?e <genre> ?e_1 . ?e_1 <pred:name> "vocal music" .  ?e <date_of_birth> ?pv . ?pv <pred:date> "1977-11-18"^^xsd:date .  }
Program:
function: Find
inputs: vocal music
function: Relate
dependencies: 0
inputs: genre
backward
function: FilterConcept
dependencies: 1
inputs: human
function: QueryAttr
dependencies: 2
inputs: date of birth
function: VerifyDate
dependencies: 3
inputs: 1977-11-18
=
Answer: no