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

### Instruction:
What is the Main span of the Qincaobei Bridge

### Inputs:
table_name: table, columns: ['Name', 'Main span metres', 'Main span feet', 'Year to open', 'Country']

### Response:
SELECT Main span feet FROM table WHERE Name = qincaobei bridge