Question: What was Joseph Stalin's role when he killed Leon Trotsky?
Choices: historian
Member states of the United Nations
the liberal state
front man
honorary member
country
lead guitarist
Intelectual author
lead vocalist
declaration of independence
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e_1 <pred:name> "Leon Trotsky" . ?e_2 <pred:name> "Joseph Stalin" . ?e_1 <killed_by> ?e_2 . [ <pred:fact_h> ?e_1 ; <pred:fact_r> <killed_by> ; <pred:fact_t> ?e_2 ] <subject_has_role> ?qpv .  }
Program:
function: Find
inputs: Leon Trotsky
function: Find
inputs: Joseph Stalin
function: QueryRelationQualifier
dependencies: 0
1
inputs: killed by
subject has role
Answer: Intelectual author