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 | Minutes | Field Goals | Rebounds | Assists | Steals | Blocks | Points |
| --- | --- | --- | --- | --- | --- | --- | --- |
| Sheri Sam | 1100.0 | 180.0 | 137.0 | 88.0 | 55.0 | 8.0 | 444.0 |
| Elena Baranova | 984.0 | 141.0 | 191.0 | 63.0 | 33.0 | 57.0 | 378.0 |
| Sandy Brondello | 850.0 | 142.0 | 50.0 | 63.0 | 27.0 | 4.0 | 367.0 |
| Ruth Riley | 799.0 | 77.0 | 130.0 | 26.0 | 25.0 | 46.0 | 218.0 |
| Debbie Black | 946.0 | 70.0 | 126.0 | 123.0 | 82.0 | 2.0 | 180.0 |
| Tracy Reid | 278.0 | 32.0 | 37.0 | 13.0 | 15.0 | 5.0 | 80.0 |
| Kristen Rasmussen | 416.0 | 31.0 | 88.0 | 16.0 | 11.0 | 14.0 | 75.0 |
| Marlies Askamp | 431.0 | 28.0 | 87.0 | 15.0 | 12.0 | 11.0 | 74.0 |
| Kisha Ford | 395.0 | 26.0 | 65.0 | 21.0 | 17.0 | 5.0 | 71.0 |
| Marla Brumfield | 247.0 | 17.0 | 25.0 | 32.0 | 20.0 | 0.0 | 44.0 |
| Katrina Colleton | 121.0 | 10.0 | 7.0 | 7.0 | 2.0 | 1.0 | 26.0 |
Question:
When 21 is the number of assists how many sets of blocks are there?
Answer:
1.0