Question: Was the written work with Toni Morrison as author published in a year excluding 1999?
Choices: yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
SPARQL: ASK { ?e <pred:instance_of> ?c . ?c <pred:name> "written work" . ?e <author> ?e_1 . ?e_1 <pred:name> "Toni Morrison" .  ?e <publication_date> ?pv . ?pv <pred:year> ?v . FILTER ( ?v != 1999 ) .  }
Program:
function: Find
inputs: Toni Morrison
function: Relate
dependencies: 0
inputs: author
backward
function: FilterConcept
dependencies: 1
inputs: written work
function: QueryAttr
dependencies: 2
inputs: publication date
function: VerifyYear
dependencies: 3
inputs: 1999
!=
Answer: yes