Question: What is the work term start date of the person who is the spouse of Hayden Christensen?
Choices: 1908
2012
1922
1973
1928
1997
1940
1986
1935
1998
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "human" . ?e <spouse> ?e_1 . ?e_1 <pred:name> "Hayden Christensen" .  ?e <work_period_(start)> ?pv .  }
Program:
function: Find
inputs: Hayden Christensen
function: Relate
dependencies: 0
inputs: spouse
backward
function: FilterConcept
dependencies: 1
inputs: human
function: QueryAttr
dependencies: 2
inputs: work period (start)
Answer: 1998