Question: Is the title of Christopher Columbus (the one whose publication date is 1949-01-01) Christopher Columbus ?
Choices: yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
SPARQL: ASK { ?e <pred:name> "Christopher Columbus" . ?e <publication_date> ?pv_1 . ?pv_1 <pred:date> "1949-01-01"^^xsd:date . ?e <title> ?pv . ?pv <pred:value> "Christopher Columbus" .  }
Program:
function: Find
inputs: Christopher Columbus
function: FilterDate
dependencies: 0
inputs: publication date
1949-01-01
=
function: QueryAttr
dependencies: 1
inputs: title
function: VerifyStr
dependencies: 2
inputs: Christopher Columbus
Answer: yes