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_1420954_1 (publication_dates VARCHAR, artist_s_ VARCHAR)

### Question ###
timothy truman worked on what dates

### Accurate SQL ###

SELECT publication_dates FROM table_1420954_1 WHERE artist_s_ = "Timothy Truman"