Question: What is the character role of Sam Waterston in Law & Order which has Clea DuVall in its cast?
Choices: Erik
Eric Forman
Trinity
Samwise Gamgee
Falkor
Robert F. Kennedy
Jack McCoy
Mark Antony
David Lightman
Lucius Fox
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e_1 <pred:name> "Law & Order" . ?e_1 <cast_member> ?e_3 . ?e_3 <pred:name> "Clea DuVall" . ?e_2 <pred:name> "Sam Waterston" . ?e_1 <cast_member> ?e_2 . [ <pred:fact_h> ?e_1 ; <pred:fact_r> <cast_member> ; <pred:fact_t> ?e_2 ] <character_role> ?qpv .  }
Program:
function: Find
inputs: Clea DuVall
function: Relate
dependencies: 0
inputs: cast member
backward
function: Find
inputs: Law & Order
function: And
dependencies: 1
2
function: Find
inputs: Sam Waterston
function: QueryRelationQualifier
dependencies: 3
4
inputs: cast member
character role
Answer: Jack McCoy