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_204_503 ( id number, "year" number, "competition" text, "venue" text, "position" text, "notes" text )

### Question ###
the european championships and the 2000 olympic games both involved this competitor in what type of competition ?

### Accurate SQL ###

SELECT "notes" FROM table_204_503 WHERE "competition" = 'european championships'