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:
| Player | No. | Nationality | Position | Years in Toronto | School/Club Team |
| --- | --- | --- | --- | --- | --- |
| Antonio Lang | 21 | United States | Guard-Forward | 1999-2000 | Duke |
| Voshon Lenard | 2 | United States | Guard | 2002-03 | Minnesota |
| Martin Lewis | 32, 44 | United States | Guard-Forward | 1996-97 | Butler CC (KS) |
| Brad Lohaus | 33 | United States | Forward-Center | 1996 | Iowa |
| Art Long | 42 | United States | Forward-Center | 2002-03 | Cincinnati |
| John Long | 25 | United States | Guard | 1996-97 | Detroit |
| Kyle Lowry | 3 | United States | Guard | 2012-Present | Villanova |
Question:
What school did player number 21 play for?
Answer:
Duke