Question: Who directed the move whose exploitation visa number is 21981?
Choices: Frank Marshall
Friedrich Nietzsche
Zhang Yimou
Federico Fellini
Ang Lee
William Wyler
Ron Howard
Richard Donner
Marc Joseph
Richard Chamberlain
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "human" . ?e_1 <director> ?e . ?e_1 <pred:instance_of> ?c_1 . ?c_1 <pred:name> "visual artwork" . ?e_1 <exploitation_visa_number> ?pv . ?pv <pred:value> "21981" .   }
Program:
function: FindAll
function: FilterStr
dependencies: 0
inputs: exploitation visa number
21981
function: FilterConcept
dependencies: 1
inputs: visual artwork
function: Relate
dependencies: 2
inputs: director
forward
function: FilterConcept
dependencies: 3
inputs: human
function: What
dependencies: 4
Answer: Federico Fellini