What is the minimum stage where Sergei Smetanine won?
CREATE TABLE table_15088557_1 (stage INTEGER, winner VARCHAR)
SELECT MIN(stage) FROM table_15088557_1 WHERE winner = "Sergei Smetanine"
### Context: CREATE TABLE table_15088557_1 (stage INTEGER, winner VARCHAR) ### Question: What is the minimum stage where Sergei Smetanine won? ### Answer: SELECT MIN(stage) FROM table_15088557_1 WHERE winner = "Sergei Smetanine"