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_60706 ( "Position" real, "Club" text, "Played" real, "Points" real, "Wins" real, "Draws" real, "Losses" real, "Goals for" real, "Goals against" real, "Goal Difference" real )

### Question ###
What is the lowest Goal Difference, when Position is '7', and when Played is greater than 30?

### Accurate SQL ###

SELECT MIN("Goal Difference") FROM table_60706 WHERE "Position" = '7' AND "Played" > '30'