Table: olympic_womens_lightweight_double_5
Columns: rank
rowers
country
time
notes

Question: Which country timed at 7:03.91?
SQL: SELECT "country" FROM olympic_womens_lightweight_double_5 WHERE "time" = '7:03.91'

Question: What did Denmark time at?
SQL: SELECT "time" FROM olympic_womens_lightweight_double_5 WHERE "country" = 'denmark'