Table: rowing_2008_men_double_2
Columns: rank
rowers
country
time
notes

Question: Who are the Rowers with a Time of 6:39.49?
SQL: SELECT "rowers" FROM rowing_2008_men_double_2 WHERE "time" = '6:39.49'

Question: What is the Country of the rowers with a Rank of 4?
SQL: SELECT "country" FROM rowing_2008_men_double_2 WHERE "rank" = 4