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_30 (nationality VARCHAR, previous_team VARCHAR, years_of_nba_experience_ VARCHAR, a_ VARCHAR)

### Question ###
Which Nationality has a Previous team of new york knicks, and more than 3 Years of NBA experience?

### Accurate SQL ###

SELECT nationality FROM table_name_30 WHERE previous_team = "new york knicks" AND years_of_nba_experience_[a_] > 3