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

### Instruction:
What is the poll source for Vivian Davis Figures at 29% and a lead margin greater than 27?

### Inputs:
table_name: table, columns: ['Poll Source', 'Dates administered', 'Democrat: Vivian Davis Figures', 'Republican: Jeff Sessions', 'Lead Margin']

### Response:
SELECT Poll Source FROM table WHERE Lead Margin > 27 AND Democrat: Vivian Davis Figures = 29%