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_17970 ( "Round" real, "Circuit" text, "Date" text, "Length" text, "Pole Position" text, "GT3 Winner" text, "GTC Winner" text )

### Question ###
what are all the date for gtc winners graeme mundy jamie smyth and gt3 winners hector lester tim mullen

### Accurate SQL ###

SELECT "Date" FROM table_17970 WHERE "GTC Winner" = 'Graeme Mundy Jamie Smyth' AND "GT3 Winner" = 'Hector Lester Tim Mullen'