user: Question: Who were the semifinalists when Sammy Giammalva was  runner-up?
Columns: ['Week of', 'Tournament', 'Champion', 'Runner-up', 'Semifinalists', 'Quarterfinalists']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['3 October', 'Brisbane , Australia Carpet – $100,000 – S32/D16', 'Pat Cash 4–6, 6–4, 6–3', 'Paul McNamee', 'Brad Gilbert John Fitzgerald', 'Simon Youl John Alexander Mike Leach Matt Mitchell']
SQL:

assistant: SELECT "Semifinalists" FROM "Table" WHERE "Runner-up" = 'Sammy Giammalva';