Table: men_50k_walk_champs
Columns: world_record
denis_nizhegorodov_rus
3_34_14
cheboksary_russia
11_may_2008

Question: When 3:38:45 is  3:34:14 what is the date on May 11th, 2008?
SQL: SELECT "11_may_2008" FROM men_50k_walk_champs WHERE "3_34_14" = '3:38:45'

Question: When north american record is the world record who is the denis nizhegorodov ( rus )?
SQL: SELECT "denis_nizhegorodov_rus" FROM men_50k_walk_champs WHERE "world_record" = 'North American record'

Question: When 3:41:20 is  3:34:14 what is cheboksary , russia?
SQL: SELECT "cheboksary_russia" FROM men_50k_walk_champs WHERE "3_34_14" = '3:41:20'