Question: When did Jon Anderson (whose official website is http://www.jonanderson.com) become a member of Yes, which received a Rock and Roll Hall of Fame?
Choices: 1898-08-12
1992-03-31
1994-05-14
1990
1993-04-08
2007-08-08
1952-04-16
1968
1996-09-12
1994-08-01
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e_1 <pred:name> "Jon Anderson" . ?e_1 <official_website> ?pv . ?pv <pred:value> "http://www.jonanderson.com" . ?e_2 <pred:name> "Yes" . ?e_2 <award_received> ?e_3 . ?e_3 <pred:name> "Rock and Roll Hall of Fame" . ?e_1 <member_of> ?e_2 . [ <pred:fact_h> ?e_1 ; <pred:fact_r> <member_of> ; <pred:fact_t> ?e_2 ] <start_time> ?qpv .  }
Program:
function: Find
inputs: Jon Anderson
function: FilterStr
dependencies: 0
inputs: official website
http://www.jonanderson.com
function: Find
inputs: Rock and Roll Hall of Fame
function: Relate
dependencies: 2
inputs: award received
backward
function: Find
inputs: Yes
function: And
dependencies: 3
4
function: QueryRelationQualifier
dependencies: 1
5
inputs: member of
start time
Answer: 1968