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_name_51 (position VARCHAR, nationality VARCHAR, nhl_team VARCHAR)

### Question ###
What position is the player that is from Canada and on the Boston Bruins

### Accurate SQL ###

SELECT position FROM table_name_51 WHERE nationality = "canada" AND nhl_team = "boston bruins"