Question: Is the watershed area of the Mississippi River not 7100000 square kilometers?
Choices:
yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
Answer: yes
SPARQL: ASK { ?e <pred:name> "Mississippi River" . ?e <watershed_area> ?pv . ?pv <pred:unit> "square kilometre" . ?pv <pred:value> ?v . FILTER ( ?v != "7100000"^^xsd:double ) .  }
Program:
function: Find
inputs: Mississippi River
function: QueryAttr
dependencies: 0
inputs: watershed area
function: VerifyNum
dependencies: 1
inputs: 7100000 square kilometre
!=