user: Question: What is the Outcome when the partner was Kristof Vliegen?
Columns: ['Outcome', 'Date', 'Surface', 'Partner', 'Opponents', 'Score']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Winner', '5 June 2004', 'Clay', 'Xavier Malisse', 'Michaël Llodra Fabrice Santoro', '7–5, 7–5']
SQL:

assistant: SELECT "Outcome" FROM "Table" WHERE "Partner" = 'Kristof Vliegen';