Question: Which movie was shot in Boston?
Choices: Howard the Duck
Unstoppable
Talk to Her
Ghostbusters
A Prairie Home Companion
Rachel Getting Married
Pleasantville
Rebecca
The Station Agent
Friday Night Lights
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "visual artwork" . ?e <filming_location> ?e_1 . ?e_1 <pred:name> "Boston" .   }
Program:
function: Find
inputs: Boston
function: Relate
dependencies: 0
inputs: filming location
backward
function: FilterConcept
dependencies: 1
inputs: visual artwork
function: What
dependencies: 2
Answer: Ghostbusters