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

### Instruction:
How many 3rd ru does Costa Rica have?

### Inputs:
table_name: table, columns: ['Rank', 'Country', 'Miss United Continent', 'Virreina', '1st RU', '2nd RU', '3rd RU', '4th RU', 'Semifinalists', 'Total']

### Response:
SELECT MAX 3rd RU FROM table WHERE Country = Costa Rica