Question: How many video game console models preceded both PlayStation 2 and Xbox 360?
Choices: 0
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SPARQL: SELECT (COUNT(DISTINCT ?e) AS ?count) WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "video game console model" . ?e_1 <follows> ?e . ?e_1 <pred:name> "PlayStation 2" .  ?e_2 <follows> ?e . ?e_2 <pred:name> "Xbox 360" .  }
Program:
function: Find
inputs: PlayStation 2
function: Relate
dependencies: 0
inputs: follows
forward
function: FilterConcept
dependencies: 1
inputs: video game console model
function: Find
inputs: Xbox 360
function: Relate
dependencies: 3
inputs: follows
forward
function: FilterConcept
dependencies: 4
inputs: video game console model
function: And
dependencies: 2
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function: Count
dependencies: 6
Answer: 0