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

Question: What is the 1st leg of team 1 Lyon?
SQL: SELECT "1st_leg" FROM uefa_champions_knockout WHERE "team_1" = 'lyon'

Question: What is the 1st leg of team 1 Liverpool?
SQL: SELECT "1st_leg" FROM uefa_champions_knockout WHERE "team_1" = 'liverpool'