On what date(s) was the winning team Prema Powerteam?
CREATE TABLE table_25213146_2 (date VARCHAR, winning_team VARCHAR)
SELECT date FROM table_25213146_2 WHERE winning_team = "Prema Powerteam"
### Context: CREATE TABLE table_25213146_2 (date VARCHAR, winning_team VARCHAR) ### Question: On what date(s) was the winning team Prema Powerteam? ### Answer: SELECT date FROM table_25213146_2 WHERE winning_team = "Prema Powerteam"