Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Date | Time | ACC Team | Big Ten Team | Location | Television | Attendance | Winner | Challenge Leader |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Mon., Nov. 29 | 7:00PM | Virginia | #13 Minnesota | Williams Arena • Minneapolis, MN | ESPN2 | 12089.0 | Virginia (87-79) | ACC (1-0) |
| Tue., Nov. 30 | 7:00PM | Wake Forest | Iowa | LJVM Coliseum • Winston-Salem, NC | ESPNU | 9086.0 | Wake Forest (76-73) | ACC (2-0) |
| Tue., Nov. 30 | 7:00PM | Georgia Tech | Northwestern | Welsh-Ryan Arena • Evanston, IL | ESPN2 | 4455.0 | Northwestern (91-71) | ACC (2-1) |
| Tue., Nov. 30 | 7:30PM | Florida State | #2 Ohio State | Donald L. Tucker Center • Tallahassee, FL | ESPN | 10457.0 | Ohio State (58-44) | Tied (2-2) |
| Tue., Nov. 30 | 9:00PM | Clemson | Michigan | Littlejohn Coliseum • Clemson, SC | ESPN2 | 7237.0 | Michigan (69-61) | Big Ten (3-2) |
| Tue., Nov. 30 | 9:30PM | North Carolina | #21 Illinois | Assembly Hall • Champaign, IL | ESPN | 16618.0 | Illinois (79-67) | Big Ten (4-2) |
| Wed., Dec. 1 | 7:15PM | Boston College | Indiana | Conte Forum • Chestnut Hill, MA | ESPNU | 5329.0 | Boston College (88-76) | Big Ten (4-3) |
| Wed., Dec. 1 | 7:15PM | NC State | Wisconsin | Kohl Center • Madison, WI | ESPN2 | 17230.0 | Wisconsin (87-48) | Big Ten (5-3) |
| Wed., Dec. 1 | 7:30PM | Virginia Tech | #18 Purdue | Cassell Coliseum • Blacksburg, VA | ESPN | 9847.0 | Purdue (58-55 OT) | Big Ten (6-3) |
| Wed., Dec. 1 | 9:15PM | Maryland | Penn State | Bryce Jordan Center • University Park, PA | ESPN2 | 9078.0 | Maryland (62-39) | Big Ten (6-4) |
Question:
Who won the game where the Challenge Leader is ACC (2-1)?
Answer:
Northwestern (91-71)