Question: Who is the sibling of Richard Attenborough ?
Choices: Joe Walsh
Casey Affleck
Richard Gere
William Henry Harrison
David Attenborough
Keith Carradine
Sylvester Stallone
Earl Scruggs
Joe Roth
Max Fleischer
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "human" . ?e_1 <sibling> ?e . ?e_1 <pred:name> "Richard Attenborough" .   }
Program:
function: Find
inputs: Richard Attenborough
function: Relate
dependencies: 0
inputs: sibling
forward
function: FilterConcept
dependencies: 1
inputs: human
function: What
dependencies: 2
Answer: David Attenborough