Question: What is the earliest year the World Junior Championships has 1500 m notes?
SQL: SELECT MIN("Year") FROM "2-17889598-1" WHERE "Notes" = '1500 m' AND "Competition" = 'World Junior Championships';

Question: Which venue had 5000 m notes in 2009 with a 1st position?
SQL: SELECT "Venue" FROM "2-17889598-1" WHERE "Notes" = '5000 m' AND "Year" = 2009.0 AND "Position" = '1st';

Question: What is the average year with 7th (heats) position?
SQL: SELECT AVG("Year") FROM "2-17889598-1" WHERE "Position" = '7th (heats)';