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

### Instruction:
Which US Cham Rank is the lowest one that has a Next Highest Spender of national assn of realtors, and a Year smaller than 2012?

### Inputs:
table_name: table, columns: ['Year', 'US Cham. Rank', 'US Cham. Spending', 'Next Highest Spender', 'Next Highest Amount']

### Response:
SELECT MIN US Cham. Rank FROM table WHERE Next Highest Spender = national assn of realtors AND Year < 2012