Question: Which visual artwork assigned exploitation visa number 21981 on 1960-05-09 is directed by Federico Fellini?
Choices: Rope
The Towering Inferno
The Fifth Element
Training Day
The Hunchback of Notre Dame
Talk to Her
A Prairie Home Companion
La Dolce Vita
Pleasantville
Rebecca
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "visual artwork" . ?e <exploitation_visa_number> ?pv . ?pv <pred:value> "21981" . [ <pred:fact_h> ?e ; <pred:fact_r> <exploitation_visa_number> ; <pred:fact_t> ?pv ] <start_time> ?qpv . ?qpv <pred:date> "1960-05-09"^^xsd:date . ?e <director> ?e_1 . ?e_1 <pred:name> "Federico Fellini" .  }
Program:
function: FindAll
function: FilterStr
dependencies: 0
inputs: exploitation visa number
21981
function: QFilterDate
dependencies: 1
inputs: start time
1960-05-09
=
function: FilterConcept
dependencies: 2
inputs: visual artwork
function: Find
inputs: Federico Fellini
function: Relate
dependencies: 4
inputs: director
backward
function: FilterConcept
dependencies: 5
inputs: visual artwork
function: And
dependencies: 3
6
function: What
dependencies: 7
Answer: La Dolce Vita