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

### Instruction:
What is the lowest rank for El Paso Natural Gas Company Building?

### Inputs:
table_name: table, columns: ['Rank', 'Name', 'Height ft ( m )', 'Floors', 'Year']

### Response:
SELECT MIN Rank FROM table WHERE Name = el paso natural gas company building