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_48413 ( "Name" text, "Gain" real, "Loss" real, "Long" real, "Avg/g" real )

### Question ###
Can you tell me the lowest Long that has the Gain of 20, and the Loss smaller than 0?

### Accurate SQL ###

SELECT MIN("Long") FROM table_48413 WHERE "Gain" = '20' AND "Loss" < '0'