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_203_168 ( id number, "team name" text, "leagues" text, "base" text, "year started" text, "year ended" text, "notable riders" text )

### Question ###
did the canterbury crusaders begin their team in 1950 , 1968 , or 1969 ?

### Accurate SQL ###

SELECT "year started" FROM table_203_168 WHERE "team name" = 'canterbury crusaders'