user: Question: What is the second leg that Valencia was on?
Columns: ['Team 1', 'Agg.', 'Team 2', '1st leg', '2nd leg']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Paris Saint-Germain', '5–1', 'Wolfsburg', '2–0', '3–1']
SQL:

assistant: SELECT "2nd leg" FROM "Table" WHERE "Team 2" = 'Valencia';