Question: Who is the person whose father is John Astin?
Choices: James Hillier Blount
Catherine Bush
Nicholas Jerry Jonas
Sean Patrick Duke
Rupert James Hector Everett
Linda Susan Maria Ronstadt
Roger George Moore
Avril Ramona Lavigne
Robert Anthony Rodríguez
Althea Rae Janairo
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "human" . ?e <father> ?e_1 . ?e_1 <pred:name> "John Astin" .  ?e <birth_name> ?pv .  }
Program:
function: Find
inputs: John Astin
function: Relate
dependencies: 0
inputs: father
backward
function: FilterConcept
dependencies: 1
inputs: human
function: QueryAttr
dependencies: 2
inputs: birth name
Answer: Sean Patrick Duke