Question: What is the relationship between The Polar Express (the one whose game mode is single-player video game) and Microsoft Windows?
Choices: country for sport
student
has effect
platform
vehicle normally used
architect
heritage designation
part of
place served by transport hub
partially contains
SPARQL: SELECT DISTINCT ?p WHERE { ?e_1 <pred:name> "The Polar Express" . ?e_1 <game_mode> ?e_3 . ?e_3 <pred:name> "single-player video game" . ?e_2 <pred:name> "Microsoft Windows" . ?e_1 ?p ?e_2 .  }
Program:
function: Find
inputs: single-player video game
function: Relate
dependencies: 0
inputs: game mode
backward
function: Find
inputs: The Polar Express
function: And
dependencies: 1
2
function: Find
inputs: Microsoft Windows
function: QueryRelation
dependencies: 3
4
Answer: platform