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

### Instruction:
What dance was Leeza Gibbons the worst dancer for, receiving a score lower than 15?

### Inputs:
table_name: table, columns: ['Dance', 'Best dancer', 'Best score', 'Worst dancer', 'Worst score']

### Response:
SELECT MIN Best score FROM table WHERE Worst dancer = leeza gibbons AND Worst score < 15