Question: When did the work period of the cast member of Stargate Atlantis start?
Choices: 1950
2007
1997
1917
1954
1844
1989
1926-04-06
2017
1999
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "human" . ?e_1 <cast_member> ?e . ?e_1 <pred:name> "Stargate Atlantis" .  ?e <work_period_(start)> ?pv .  }
Program:
function: Find
inputs: Stargate Atlantis
function: Relate
dependencies: 0
inputs: cast member
forward
function: FilterConcept
dependencies: 1
inputs: human
function: QueryAttr
dependencies: 2
inputs: work period (start)
Answer: 1999