Question: what is the number of visual artworks that take place in Whoniverse and have lyrics that are written by Maureen Stapleton?
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SPARQL: SELECT (COUNT(DISTINCT ?e) AS ?count) WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "visual artwork" . ?e <takes_place_in_fictional_universe> ?e_1 . ?e_1 <pred:name> "Whoniverse" .  ?e <lyrics_by> ?e_2 . ?e_2 <pred:name> "Maureen Stapleton" .  }
Program:
function: Find
inputs: Whoniverse
function: Relate
dependencies: 0
inputs: takes place in fictional universe
backward
function: FilterConcept
dependencies: 1
inputs: visual artwork
function: Find
inputs: Maureen Stapleton
function: Relate
dependencies: 3
inputs: lyrics by
backward
function: FilterConcept
dependencies: 4
inputs: visual artwork
function: And
dependencies: 2
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function: Count
dependencies: 6
Answer: 0