Question: Did someone born in 1798 die on 1880-06-04 ?
Choices:
yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
Answer: yes
SPARQL: ASK { ?e <pred:instance_of> ?c . ?c <pred:name> "human" . ?e <date_of_birth> ?pv_1 . ?pv_1 <pred:year> 1798 . ?e <date_of_death> ?pv . ?pv <pred:date> "1880-06-04"^^xsd:date .  }
Program:
function: FindAll
function: FilterYear
dependencies: 0
inputs: date of birth
1798
=
function: FilterConcept
dependencies: 1
inputs: human
function: QueryAttr
dependencies: 2
inputs: date of death
function: VerifyDate
dependencies: 3
inputs: 1880-06-04
=