user: Question: Who has a Team classification of La Vie Claire, a stage of 20, a General classification of Greg LeMond?
Columns: ['Stage', 'Winner', 'General classification', 'Points classification', 'Young rider classification', 'Team classification']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['P', 'Thierry Marie', 'Thierry Marie', 'Thierry Marie', 'Jesus Blanco Villar', 'Système U']
SQL:

assistant: SELECT "Winner" FROM "Table" WHERE "Team classification" = 'La Vie Claire' AND "General classification" = 'Greg LeMond' AND "Stage" = '20';