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_19 ( round INTEGER, name VARCHAR, overall VARCHAR )

### Question ###
With an Overall larger than 107, in what Round was Jim Duncan picked?

### Accurate SQL ###

SELECT SUM(round) FROM table_name_19 WHERE name = "jim duncan" AND overall > 107