Question: What music genre's famous person is Stevie Ray Vaughan and beginning date is before 1956?
Choices: electric blues
jazz fusion
Mandopop
classical music
symphony
noise music
contemporary classical music
neofolk
Texas blues
Cajun music
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "music genre" . ?e <famous_people> ?e_1 . ?e_1 <pred:name> "Stevie Ray Vaughan" .  ?e <inception> ?pv . ?pv <pred:year> ?v . FILTER ( ?v < 1956 ) .  }
Program:
function: Find
inputs: Stevie Ray Vaughan
function: Relate
dependencies: 0
inputs: famous people
backward
function: FilterConcept
dependencies: 1
inputs: music genre
function: FindAll
function: FilterYear
dependencies: 3
inputs: inception
1956
<
function: FilterConcept
dependencies: 4
inputs: music genre
function: And
dependencies: 2
5
function: What
dependencies: 6
Answer: Texas blues