Table: volleyball_world_league_match
Columns: date
score
set_1
set_2
set_3
set_4
set_5
total

Question: What is Set 4, when Set 1 is 19-25, and when Set 2 is 23-25?
SQL: SELECT "set_4" FROM volleyball_world_league_match WHERE "set_1" = '19-25' AND "set_2" = '23-25'

Question: What is Set 1, when Set 4 is NA, when Score is 3-0, and when Set 2 is 29-27?
SQL: SELECT "set_1" FROM volleyball_world_league_match WHERE "set_4" = 'na' AND "score" = '3-0' AND "set_2" = '29-27'

Question: What is Set 2, when Date is May 31?
SQL: SELECT "set_2" FROM volleyball_world_league_match WHERE "date" = 'may 31'

Question: What is Set 1, when Set 2 is 17-25?
SQL: SELECT "set_1" FROM volleyball_world_league_match WHERE "set_2" = '17-25'

Question: What is Set 3, when Set 4 is 25-21, and when Date is Jun 14?
SQL: SELECT "set_3" FROM volleyball_world_league_match WHERE "set_4" = '25-21' AND "date" = 'jun 14'