Question: Was Arthur Conan Doyle (the one that origins from United States of America) published after 1877?
Choices:
yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
Program:
function: Find
inputs: United States of America
function: Relate
dependencies: 0
inputs: country of origin
backward
function: Find
inputs: Arthur Conan Doyle
function: And
dependencies: 1
2
function: QueryAttr
dependencies: 3
inputs: publication date
function: VerifyYear
dependencies: 4
inputs: 1877
>
SPARQL: ASK { ?e <pred:name> "Arthur Conan Doyle" . ?e <country_of_origin> ?e_1 . ?e_1 <pred:name> "United States of America" .  ?e <publication_date> ?pv . ?pv <pred:year> ?v . FILTER ( ?v > 1877 ) .  }
Answer: yes