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_12 ( long INTEGER, yards VARCHAR, player VARCHAR )

### Question ###
Name the sum of Long for yards less than 197 and players of matt nagy

### Accurate SQL ###

SELECT SUM(long) FROM table_name_12 WHERE yards < 197 AND player = "matt nagy"