Question: What kind of job performing research belongs to Richard Attenborough's sibling?
Choices: physicist
film director
screenwriter
astronomer
journalist
computer scientist
biochemist
statistician
make-up artist
biologist
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "researcher" . ?e_1 <occupation> ?e . ?e_1 <pred:instance_of> ?c_1 . ?c_1 <pred:name> "human" . ?e_1 <sibling> ?e_2 . ?e_2 <pred:name> "Richard Attenborough" .   }
Program:
function: Find
inputs: Richard Attenborough
function: Relate
dependencies: 0
inputs: sibling
backward
function: FilterConcept
dependencies: 1
inputs: human
function: Relate
dependencies: 2
inputs: occupation
forward
function: FilterConcept
dependencies: 3
inputs: researcher
function: What
dependencies: 4
Answer: biologist