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

### Instruction:
What is the average ARWU 2012 ranking of Illinois, Champaign, which has a USN 2013 ranking less than 91 and an EC 2013 ranking larger than 1000?

### Inputs:
table_name: table, columns: ['Location (State, City)', 'USN 2013', 'BW 2013', 'Forbes 2011', 'Ec 2013', 'FT 2011', 'AE 2011', 'CNN 2011', 'BI 2013', 'ARWU 2012']

### Response:
SELECT AVG ARWU 2012 FROM table WHERE USN 2013 < 91 AND Location (State, City) = illinois, champaign AND Ec 2013 > 1000