Question: Which has the most units sold among the video game console models that are a platform of Guitar Hero World Tour?
Choices: Danny Elfman
Xbox 360
Medford
SpVgg Unterhaching
Ben Johnson
Nintendo Entertainment System
Appalachian dulcimer
PlayStation 2
PlayStation 3
Wii
SPARQL: SELECT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "video game console model" . ?e_1 <platform> ?e . ?e_1 <pred:name> "Guitar Hero World Tour" .  ?e <units_sold> ?pv . ?pv <pred:value> ?v .  } ORDER BY DESC(?v) LIMIT 1
Program:
function: Find
inputs: Guitar Hero World Tour
function: Relate
dependencies: 0
inputs: platform
forward
function: FilterConcept
dependencies: 1
inputs: video game console model
function: SelectAmong
dependencies: 2
inputs: units sold
largest
Answer: PlayStation 2