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 festival_detail ( festival_id number, festival_name text, chair_name text, location text, year number, num_of_audience number )
TABLE: CREATE TABLE nomination ( artwork_id number, festival_id number, result text )
TABLE: CREATE TABLE artwork ( artwork_id number, type text, name text )

### Question ###
What are the names of the chairs of festivals, sorted in ascending order of the year held?

### Accurate SQL ###

SELECT chair_name FROM festival_detail ORDER BY year