Question: Is Essen_Ruhr the Twitter username of Essen?
Choices:
yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
Answer: yes
SPARQL: ASK { ?e <pred:name> "Essen" . ?e <Twitter_username> ?pv . ?pv <pred:value> "Essen_Ruhr" .  }
Program:
function: Find
inputs: Essen
function: QueryAttr
dependencies: 0
inputs: Twitter username
function: VerifyStr
dependencies: 1
inputs: Essen_Ruhr