Question: What is the title for the television series starring Robert Stack?
Choices: Coronation Street
London
America America
The Untouchables
The Blues Brothers
The Postman
Jonah Hex
The Amazing Spider-Man
The Spy Who Loved Me
The Simpsons
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "television series" . ?e <cast_member> ?e_1 . ?e_1 <pred:name> "Robert Stack" .  ?e <title> ?pv .  }
Program:
function: Find
inputs: Robert Stack
function: Relate
dependencies: 0
inputs: cast member
backward
function: FilterConcept
dependencies: 1
inputs: television series
function: QueryAttr
dependencies: 2
inputs: title
Answer: The Untouchables