Question: Is the date of death for businessperson Ben Harper 2006-04-28?
Choices: yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
SPARQL: ASK { ?e <pred:name> "Ben Harper" . ?e <occupation> ?e_1 . ?e_1 <pred:name> "businessperson" .  ?e <date_of_death> ?pv . ?pv <pred:date> "2006-04-28"^^xsd:date .  }
Program:
function: Find
inputs: businessperson
function: Relate
dependencies: 0
inputs: occupation
backward
function: Find
inputs: Ben Harper
function: And
dependencies: 1
2
function: QueryAttr
dependencies: 3
inputs: date of death
function: VerifyDate
dependencies: 4
inputs: 2006-04-28
=
Answer: no