Question: When did the cast member of Upstairs, Downstairs begin working?
Choices:
1998
1981
1930
1913
1878
1953
1979
2001
1960
1961
Answer: 1953
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "human" . ?e_1 <cast_member> ?e . ?e_1 <pred:name> "Upstairs, Downstairs" .  ?e <work_period_(start)> ?pv .  }
Program:
function: Find
inputs: Upstairs, Downstairs
function: Relate
dependencies: 0
inputs: cast member
forward
function: FilterConcept
dependencies: 1
inputs: human
function: QueryAttr
dependencies: 2
inputs: work period (start)