Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_2897457_2 (nationality VARCHAR, position VARCHAR, nhl_team VARCHAR)

### Question ###
What is the nationality of the draft pick player who plays centre position and is going to Calgary Flames?

### Accurate SQL ###

SELECT nationality FROM table_2897457_2 WHERE position = "Centre" AND nhl_team = "Calgary Flames"