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_21893 ( "Tournament Appearances" real, "Team" text, "League" text, "Wins" real, "Final Losses" real, "Semi-Final Losses" real, "Fourth-Place*" real, "Final Win %" text, "Years of appearance" text )

### Question ###
What is the year of appearance for the Prince Albert Raiders?

### Accurate SQL ###

SELECT "Years of appearance" FROM table_21893 WHERE "Team" = 'Prince Albert Raiders'