Question: Did Apache (the one that is an ethnic group of African Americans) die after 1999?
Choices:
yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
Program:
function: Find
inputs: African Americans
function: Relate
dependencies: 0
inputs: ethnic group
backward
function: Find
inputs: Apache
function: And
dependencies: 1
2
function: QueryAttr
dependencies: 3
inputs: date of death
function: VerifyYear
dependencies: 4
inputs: 1999
>
SPARQL: ASK { ?e <pred:name> "Apache" . ?e <ethnic_group> ?e_1 . ?e_1 <pred:name> "African Americans" .  ?e <date_of_death> ?pv . ?pv <pred:year> ?v . FILTER ( ?v > 1999 ) .  }
Answer: yes