What is the 1st leg when club is a.c. libertas?
{'header': ['Season', 'Competition', 'Round', 'Club', '1st leg', '2nd leg', 'Aggregate'], 'page_title': 'Drogheda United F.C.', 'page_id': '', 'types': ['text', 'text', 'text', 'text', 'text', 'text', 'text'], 'id': '1-1233026-4', 'section_title': 'Past opponents', 'caption': 'Past opponents', 'rows': [['1983–84', 'UEFA Cup', 'First round', 'Tottenham Hotspur F.C.', '0–6', '0–8', '0–14'], ['2006–07', 'UEFA Cup', 'First qualifying round', 'HJK Helsinki', '1–1', '3–1', '4–2 ( aet )'], ['2006–07', 'UEFA Cup', 'Second qualifying round', 'I.K. Start', '0–1', '1–0', '1–1 (10–11 p )'], ['2007–08', 'UEFA Cup', 'First qualifying round', 'A.C. Libertas', '1–1', '3–0', '4–1'], ['2007–08', 'UEFA Cup', 'Second qualifying round', 'Helsingborgs', '1–1', '0–3', '1–4'], ['2008–09', 'UEFA Champions League', 'First qualifying round', 'FC Levadia Tallinn', '2–1', '1–0', '3–1'], ['2008–09', 'UEFA Champions League', 'Second qualifying round', 'FC Dynamo Kyiv', '1–2', '2–2', '3–4']], 'name': 'table_1233026_4'}