Question: Is the work period (start) of the group of fictional characters that derives X-Men (which has Ian McKellen as a cast member) before 1913?
Choices: yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
SPARQL: ASK { ?e <pred:instance_of> ?c . ?c <pred:name> "group of fictional characters" . ?e <derivative_work> ?e_1 . ?e_1 <pred:name> "X-Men" . ?e_1 <cast_member> ?e_2 . ?e_2 <pred:name> "Ian McKellen" .  ?e <work_period_(start)> ?pv . ?pv <pred:year> ?v . FILTER ( ?v < 1913 ) .  }
Program:
function: Find
inputs: Ian McKellen
function: Relate
dependencies: 0
inputs: cast member
backward
function: Find
inputs: X-Men
function: And
dependencies: 1
2
function: Relate
dependencies: 3
inputs: derivative work
backward
function: FilterConcept
dependencies: 4
inputs: group of fictional characters
function: QueryAttr
dependencies: 5
inputs: work period (start)
function: VerifyYear
dependencies: 6
inputs: 1913
<
Answer: no