Question: Is the pseudonym of a person that authored  Lemony Snicket's A Series of Unfortunate Events (the one whose publication date is 2004-12-16), Écho ?
Choices:
yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
Answer: no
SPARQL: ASK { ?e <pred:instance_of> ?c . ?c <pred:name> "human" . ?e_1 <after_a_work_by> ?e . ?e_1 <pred:name> "Lemony Snicket's A Series of Unfortunate Events" . ?e_1 <publication_date> ?pv_1 . ?pv_1 <pred:date> "2004-12-16"^^xsd:date . ?e <pseudonym> ?pv . ?pv <pred:value> "Écho" .  }
Program:
function: Find
inputs: Lemony Snicket's A Series of Unfortunate Events
function: FilterDate
dependencies: 0
inputs: publication date
2004-12-16
=
function: Relate
dependencies: 1
inputs: after a work by
forward
function: FilterConcept
dependencies: 2
inputs: human
function: QueryAttr
dependencies: 3
inputs: pseudonym
function: VerifyStr
dependencies: 4
inputs: Écho