Question: Who is the proxy for Saskatchewan's (the one whose subreddit is Saskatchewan) head Elizabeth II?
Choices: Vaughn Solomon Schofield
Albert Grey, 4th Earl Grey
Vere Ponsonby, 9th Earl of Bessborough
Harold Alexander, 1st Earl Alexander of Tunis
Prince Arthur, Duke of Connaught and Strathearn
Georges Vanier
Jocelyne Roy-Vienneau
Michaëlle Jean
Gilbert Elliot-Murray-Kynynmound, 4th Earl of Minto
Jules Léger
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e_1 <pred:name> "Saskatchewan" . ?e_1 <subreddit> ?pv . ?pv <pred:value> "Saskatchewan" . ?e_2 <pred:name> "Elizabeth II" . ?e_1 <head_of_state> ?e_2 . [ <pred:fact_h> ?e_1 ; <pred:fact_r> <head_of_state> ; <pred:fact_t> ?e_2 ] <proxy> ?qpv .  }
Program:
function: Find
inputs: Saskatchewan
function: FilterStr
dependencies: 0
inputs: subreddit
Saskatchewan
function: Find
inputs: Elizabeth II
function: QueryRelationQualifier
dependencies: 1
2
inputs: head of state
proxy
Answer: Vaughn Solomon Schofield