Table: athletics_results_5
Columns: year
competition
venue
position
notes

Question: Which Year is the highest one that has a Venue of edmonton, canada?
SQL: SELECT MAX("year") FROM athletics_results_5 WHERE "venue" = 'edmonton, canada'

Question: Which Position has a Competition of world championships, and a Year larger than 1997?
SQL: SELECT "position" FROM athletics_results_5 WHERE "competition" = 'world championships' AND "year" > 1997

Question: Which Venue has a Notes of heptathlon, and a Year of 1991?
SQL: SELECT "venue" FROM athletics_results_5 WHERE "notes" = 'heptathlon' AND "year" = 1991