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_name_28 (years_played INTEGER, singles_win_loss VARCHAR, first_year_played VARCHAR)

### Question ###
How many years did the team that has a Singles win-Loss of 4-9 and first played before 1999?

### Accurate SQL ###

SELECT SUM(years_played) FROM table_name_28 WHERE singles_win_loss = "4-9" AND first_year_played < 1999