Question: What historical county has had military conflicts with Kingdom of Prussia?
Choices: Confederate States of America
Macedonia
Russian Empire
Swedish Empire
Union of South Africa
German Empire
Habsburg Monarchy
Spanish Empire
Electorate of Saxony
Abyssinia
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "historical country" . ?e <military_conflicts> ?e_1 . ?e_1 <pred:name> "Kingdom of Prussia" .   }
Program:
function: Find
inputs: Kingdom of Prussia
function: Relate
dependencies: 0
inputs: military conflicts
backward
function: FilterConcept
dependencies: 1
inputs: historical country
function: What
dependencies: 2
Answer: Electorate of Saxony