Question: Did the Winter Olympic Games that followed the 1972 Winter Olympics not end in 1981?
Choices:
yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
Program:
function: Find
inputs: 1972 Winter Olympics
function: Relate
dependencies: 0
inputs: follows
backward
function: FilterConcept
dependencies: 1
inputs: Winter Olympic Games
function: QueryAttr
dependencies: 2
inputs: end time
function: VerifyYear
dependencies: 3
inputs: 1981
!=
SPARQL: ASK { ?e <pred:instance_of> ?c . ?c <pred:name> "Winter Olympic Games" . ?e <follows> ?e_1 . ?e_1 <pred:name> "1972 Winter Olympics" .  ?e <end_time> ?pv . ?pv <pred:year> ?v . FILTER ( ?v != 1981 ) .  }
Answer: yes