Question: Was the publication date for the written work known by a OCLC control number of 26502801 not in 1937?
Choices: yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
SPARQL: ASK { ?e <pred:instance_of> ?c . ?c <pred:name> "written work" . ?e <OCLC_control_number> ?pv_1 . ?pv_1 <pred:value> "26502801" . ?e <publication_date> ?pv . ?pv <pred:year> ?v . FILTER ( ?v != 1973 ) .  }
Program:
function: FindAll
function: FilterStr
dependencies: 0
inputs: OCLC control number
26502801
function: FilterConcept
dependencies: 1
inputs: written work
function: QueryAttr
dependencies: 2
inputs: publication date
function: VerifyYear
dependencies: 3
inputs: 1973
!=
Answer: yes