Question: Did the dissolution date of the CBS Corporation 's date happen before 1990?
Choices: yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
SPARQL: ASK { ?e <pred:instance_of> ?c . ?c <pred:name> "business" . ?e_1 <subsidiary> ?e . ?e_1 <pred:name> "CBS Corporation" .  ?e <dissolved,_abolished_or_demolished> ?pv . ?pv <pred:year> ?v . FILTER ( ?v < 1990 ) .  }
Program:
function: Find
inputs: CBS Corporation
function: Relate
dependencies: 0
inputs: subsidiary
forward
function: FilterConcept
dependencies: 1
inputs: business
function: QueryAttr
dependencies: 2
inputs: dissolved, abolished or demolished
function: VerifyYear
dependencies: 3
inputs: 1990
<
Answer: no