Table: arg_1985_football_2
Columns: home_1st_leg
home_2nd_leg
1st_leg
2nd_leg
aggregate

Question: What is the 1st leg for Instituto?
SQL: SELECT "1st_leg" FROM arg_1985_football_2 WHERE "home_2nd_leg" = 'instituto'

Question: What Aggregate has a 2-1 1st leg, and is from Belgrano?
SQL: SELECT "aggregate" FROM arg_1985_football_2 WHERE "1st_leg" = '2-1' AND "home_1st_leg" = 'belgrano'

Question: What Aggregate has a 0-0 1st leg, and a 0-1 second leg?
SQL: SELECT "aggregate" FROM arg_1985_football_2 WHERE "1st_leg" = '0-0' AND "2nd_leg" = '0-1'

Question: What aggregate has a 0-0 1st leg, and is from Instituto?
SQL: SELECT "aggregate" FROM arg_1985_football_2 WHERE "1st_leg" = '0-0' AND "home_2nd_leg" = 'instituto'

Question: What is the home of aggregate's 3-4?
SQL: SELECT "home_2nd_leg" FROM arg_1985_football_2 WHERE "aggregate" = '3-4'