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

### Instruction:
Tell me the sum of silver for liechtenstein and bronze more than 4

### Inputs:
table_name: table, columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']

### Response:
SELECT SUM Silver FROM table WHERE Nation = liechtenstein AND Bronze > 4