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_of_nba_experience_ VARCHAR, a_ VARCHAR, pos VARCHAR, team VARCHAR )

### Question ###
How many years of NBA experience does the player who plays position g for the Portland Trail Blazers?

### Accurate SQL ###

SELECT years_of_nba_experience_ AS "a_" FROM table_name_28 WHERE pos = "g" AND team = "portland trail blazers"