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_14903491_1 ( year VARCHAR, womens_doubles VARCHAR, mens_singles VARCHAR )

### Question ###
Name the number of years for womens doubles being diana koleva emilia dimitrova and jeliazko valkov

### Accurate SQL ###

SELECT COUNT(year) FROM table_14903491_1 WHERE womens_doubles = "Diana Koleva Emilia Dimitrova" AND mens_singles = "Jeliazko Valkov"