user: Question: What was the surface where the opponent was Nathalie Dechy Meilen Tu?
Columns: ['Date', 'Tournament', 'Surface', 'Partner', 'Opponent in the final', 'Score']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['3 May 1998', 'Hamburg , Germany', 'Clay', 'Barbara Schett', 'Martina Hingis Jana Novotná', '7–6, 3–6, 6–3']
SQL:

assistant: SELECT "Surface" FROM "Table" WHERE "Opponent in the final" = 'Nathalie Dechy Meilen Tu';