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:
| Game | Date | Opponent | Result | Cowboys points | Opponents | Record |
| --- | --- | --- | --- | --- | --- | --- |
| 1.0 | Sept. 16 | @ Arizona | Win | 36.0 | 17.0 | 1-0 |
| 2.0 | Sept. 23 | Air Force | Win | 37.0 | 10.0 | 2-0 |
| 3.0 | Sept. 30 | Colorado State | Win | 13.0 | 10.0 | 3-0 |
| 4.0 | Oct. 7 | Brigham Young | Win | 26.0 | 10.0 | 4-0 |
| 5.0 | Oct. 14 | @ Utah | Win | 28.0 | 0.0 | 5-0 |
| 6.0 | Oct. 21 | Wichita State | Win | 30.0 | 7.0 | 6-0 |
| 7.0 | Oct. 28 | @ Arizona State | Win | 15.0 | 13.0 | 7-0 |
| 8.0 | Nov. 4 | @ San Jose State | Win | 28.0 | 7.0 | 8-0 |
| 9.0 | Nov. 11 | @ New Mexico | Win | 42.0 | 6.0 | 9-0 |
Question:
How many opponents were there when the record was 6-0?
Answer:
Oct. 21