Table: volleyball_world_league_match_5
Columns: date
score
set_1
set_2
set_3
set_4
set_5
total

Question: What set 2 has a set 4 of 21-25?
SQL: SELECT "set_2" FROM volleyball_world_league_match_5 WHERE "set_4" = '21-25'

Question: What was the score when set 3 was 26-28?
SQL: SELECT "score" FROM volleyball_world_league_match_5 WHERE "set_3" = '26-28'

Question: When was set 3 of 18-25?
SQL: SELECT "date" FROM volleyball_world_league_match_5 WHERE "set_3" = '18-25'