Question: Which cast member plays Tony Stark in the Vietnam-released Iron Man 2?
Choices: David Byrne
Robert Downey Jr.
Scarlett Johansson
Sam Rockwell
Richard Gere
Mickey Rourke
Max Fleischer
Sylvester Stallone
John Slattery
Don Cheadle
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "human" . ?e_1 <cast_member> ?e . ?e_1 <pred:name> "Iron Man 2" . ?e_1 <film_release_region> ?e_2 . ?e_2 <pred:name> "Vietnam" .  [ <pred:fact_h> ?e_1 ; <pred:fact_r> <cast_member> ; <pred:fact_t> ?e ] <character_role> ?qpv . ?qpv <pred:value> "Tony Stark" .  }
Program:
function: Find
inputs: Vietnam
function: Relate
dependencies: 0
inputs: film release region
backward
function: Find
inputs: Iron Man 2
function: And
dependencies: 1
2
function: Relate
dependencies: 3
inputs: cast member
forward
function: QFilterStr
dependencies: 4
inputs: character role
Tony Stark
function: FilterConcept
dependencies: 5
inputs: human
function: What
dependencies: 6
Answer: Robert Downey Jr.