user: Question: In 1987, what is the Runners-up when Stefan Edberg is Champion?
Columns: ['Year', 'Name of Tournament', 'Champions', 'Runners-up', 'Score']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1978.0, 'Seiko World Super Tennis', 'Björn Borg', 'Brian Teacher', '6–3, 6–4']
SQL:

assistant: SELECT "Runners-up" FROM "Table" WHERE "Champions" = 'Stefan Edberg' AND "Year" = 1987.0;