Question: Is 3.9 years not the length of the visual artwork whose producer is David Mandel?
Choices:
yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
Program:
function: Find
inputs: David Mandel
function: Relate
dependencies: 0
inputs: producer
backward
function: FilterConcept
dependencies: 1
inputs: visual artwork
function: QueryAttr
dependencies: 2
inputs: duration
function: VerifyNum
dependencies: 3
inputs: 3.9 year
!=
SPARQL: ASK { ?e <pred:instance_of> ?c . ?c <pred:name> "visual artwork" . ?e <producer> ?e_1 . ?e_1 <pred:name> "David Mandel" .  ?e <duration> ?pv . ?pv <pred:unit> "year" . ?pv <pred:value> ?v . FILTER ( ?v != "3.9"^^xsd:double ) .  }
Answer: no