Table: olympic_lightweight_four
Columns: rank
rowers
country
time
notes

Question: What country has sa/b as the notes, and a time of 5:51.30?
SQL: SELECT "country" FROM olympic_lightweight_four WHERE "notes" = 'sa/b' AND "time" = '5:51.30'

Question: Who were the rowers when notes were sa/b, with a time of 5:51.30?
SQL: SELECT "rowers" FROM olympic_lightweight_four WHERE "notes" = 'sa/b' AND "time" = '5:51.30'

Question: What country is ranked larger than 4?
SQL: SELECT "country" FROM olympic_lightweight_four WHERE "rank" > 4