Question: What sovereign state part of Joseon?
Choices: Switzerland
British Raj
Weimar Republic
Czechoslovakia
Federated States of Micronesia
Norway
Ecuador
Joseon
Cambodia
Korea
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "sovereign state" . ?e <country> ?e_1 . ?e_1 <pred:name> "Joseon" .   }
Program:
function: Find
inputs: Joseon
function: Relate
dependencies: 0
inputs: country
backward
function: FilterConcept
dependencies: 1
inputs: sovereign state
function: What
dependencies: 2
Answer: Joseon