Question: When did Ludwig van Beethoven whose Libris-URI is fcrtthqz07g9rj7 become a student of Joseph Haydn?
Choices: 1582-11-28
1937-01-21
2009-08-07
2003-11-26
1940-08-03
2013-09-24
1792
1978-09-19
2010-10-26
1940
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e_1 <pred:name> "Ludwig van Beethoven" . ?e_1 <Libris-URI> ?pv . ?pv <pred:value> "fcrtthqz07g9rj7" . ?e_2 <pred:name> "Joseph Haydn" . ?e_1 <student_of> ?e_2 . [ <pred:fact_h> ?e_1 ; <pred:fact_r> <student_of> ; <pred:fact_t> ?e_2 ] <start_time> ?qpv .  }
Program:
function: Find
inputs: Ludwig van Beethoven
function: FilterStr
dependencies: 0
inputs: Libris-URI
fcrtthqz07g9rj7
function: Find
inputs: Joseph Haydn
function: QueryRelationQualifier
dependencies: 1
2
inputs: student of
start time
Answer: 1792