Table: olympic_womens_lightweight_double_2
Columns: rank
rowers
country
time
notes

Question: Who were the rowers who had a time of 7:39.70?
SQL: SELECT "rowers" FROM olympic_womens_lightweight_double_2 WHERE "time" = '7:39.70'

Question: Who were the rowers from china wh had a rank smaller than 4?
SQL: SELECT "rowers" FROM olympic_womens_lightweight_double_2 WHERE "rank" < 4 AND "country" = 'china'

Question: What is the notes for the rowers from denmark?
SQL: SELECT "notes" FROM olympic_womens_lightweight_double_2 WHERE "country" = 'denmark'