Question: What is the earliest year of Valdimir Poelnikov, who has a final position-tour bigger than 72, a final position-vuelta less than 77, and a final position-giro less than 57?
SQL: SELECT MIN Year FROM table WHERE Final Position - Tour > 72 AND Final Position - Vuelta < 77 AND Final Position - Giro < 57 AND Rider = valdimir poelnikov