Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Who played in the semi finals matches at the Buick WCT finals?

### Inputs:
table_name: table, columns: ['Date Final', 'Tournament', 'Commercial Name', 'Category', 'Prize Money/ Surface', 'Final Match', 'Semifinal Matches']

### Response:
SELECT Semifinal Matches FROM table WHERE Commercial Name = Buick WCT Finals