Question: Was Erfurt's area not equal to 50 square versta in 2016?
Choices:
yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
Answer: no
SPARQL: ASK { ?e <pred:name> "Erfurt" . ?e <area> ?pv . ?pv <pred:unit> "square versta" . ?pv <pred:value> ?v . FILTER ( ?v != "50"^^xsd:double ) . [ <pred:fact_h> ?e ; <pred:fact_r> <area> ; <pred:fact_t> ?pv ] <point_in_time> ?qpv . ?qpv <pred:year> 2016 .  }
Program:
function: Find
inputs: Erfurt
function: QueryAttrUnderCondition
dependencies: 0
inputs: area
point in time
2016
function: VerifyNum
dependencies: 1
inputs: 50 square versta
!=