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 | at/vs. | Opponent' | Score' | Attendance | Record |
| --- | --- | --- | --- | --- | --- |
| January 9, 1988 | at | Washington Wave | 13 - 14 | 6624.0 | Loss |
| January 16, 1988 | vs. | Washington Wave | 10 - 11 | 13814.0 | Loss |
| January 30, 1988 | vs. | Baltimore Thunder | 12 - 7 | 16028.0 | Win |
| February 6, 1988 | vs. | New Jersey Saints | 7 - 10 | 9064.0 | Loss |
| February 14, 1988 | at | Washington Wave | 12 - 13 | 6683.0 | Loss |
| February 20, 1988 | vs. | Baltimore Thunder | 14 - 13 | 10004.0 | Win |
| February 21, 1988 | at | New Jersey Saints | 12 - 13 | 6427.0 | Loss |
| February 27, 1988 | at | Baltimore Thunder | 17 - 9 | 4937.0 | Win |
| March 6, 1988 | at | New Jersey Saints | 10 - 12 | 4118.0 | Loss |
Question:
How many were in Attendance on February 21, 1988 against the New Jersey Saints?
Answer:
6427.0