Question: Regarding the estate in the land owned by California Institute of Technology is the opening date prior to 1983?
Choices: yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
SPARQL: ASK { ?e <pred:instance_of> ?c . ?c <pred:name> "estate in land" . ?e <owned_by> ?e_1 . ?e_1 <pred:name> "California Institute of Technology" .  ?e <date_of_official_opening> ?pv . ?pv <pred:year> ?v . FILTER ( ?v < 1983 ) .  }
Program:
function: Find
inputs: California Institute of Technology
function: Relate
dependencies: 0
inputs: owned by
backward
function: FilterConcept
dependencies: 1
inputs: estate in land
function: QueryAttr
dependencies: 2
inputs: date of official opening
function: VerifyYear
dependencies: 3
inputs: 1983
<
Answer: yes