Table: african_cup_football_6
Columns: team_1
agg
team_2
1st_leg
2nd_leg

Question: What is Team 1 when Team 2 is Jac Port-Gentil?
SQL: SELECT "team_1" FROM african_cup_football_6 WHERE "team_2" = 'jac port-gentil'

Question: What was Team 2 with a 2nd leg of 0-0?
SQL: SELECT "team_2" FROM african_cup_football_6 WHERE "2nd_leg" = '0-0'

Question: What is the 1st leg of the Round that has a 2nd leg of 1-3 and Team 1 Es Tunis?
SQL: SELECT "1st_leg" FROM african_cup_football_6 WHERE "2nd_leg" = '1-3' AND "team_1" = 'es tunis'