Question: When did guitarist Roger Taylor become a member of pop music's Queen?
Choices: 1955-04-04
1975-05-16
1917-01-01
1968-02-06
1964-09-10
2000-12-26
2005-12-10
1792-04-20
1970
1961-08-04
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e_1 <pred:name> "Queen" . ?e_3 <famous_people> ?e_1 . ?e_3 <pred:name> "pop music" . ?e_2 <pred:name> "Roger Taylor" . ?e_2 <instrument> ?e_4 . ?e_4 <pred:name> "guitar" . ?e_1 <has_part> ?e_2 . [ <pred:fact_h> ?e_1 ; <pred:fact_r> <has_part> ; <pred:fact_t> ?e_2 ] <start_time> ?qpv .  }
Program:
function: Find
inputs: pop music
function: Relate
dependencies: 0
inputs: famous people
forward
function: Find
inputs: Queen
function: And
dependencies: 1
2
function: Find
inputs: guitar
function: Relate
dependencies: 4
inputs: instrument
backward
function: Find
inputs: Roger Taylor
function: And
dependencies: 5
6
function: QueryRelationQualifier
dependencies: 3
7
inputs: has part
start time
Answer: 1970