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:
| Month/Year | Day Sorties (losses) | Night Sorties (Losses) | Luftflotte 2 sorties | Luftflotte 3 sorties | Major attacks | Heavy attacks |
| --- | --- | --- | --- | --- | --- | --- |
| October 1940 | 2,300 (79) | 5,900 (23) | 2400.0 | 3500.0 | 25 | 4.0 |
| November 1940 | 925 (65) | 6,125 (48) | 1600.0 | 4525.0 | 23 | 2.0 |
| December 1940 | 650 (24) | 3,450 (44) | 700.0 | 2750.0 | 11 | 5.0 |
| January 1941 | 675 (7) | 2,050 (22) | 450.0 | 1600.0 | 7 | 6.0 |
| February 1941 | 500 (9) | 1,450 (18) | 475.0 | 975.0 | – | 2.0 |
| March 1941 | 800 (8) | 4,275 (46) | 1625.0 | 2650.0 | 12 | 3.0 |
| April 1941 | 800 (9) | 5,250 (58) | 1500.0 | 3750.0 | 16 | 5.0 |
| May 1941 | 200 (3) | 3,800 (55) | 1300.0 | 2500.0 | 11 | 3.0 |
Question:
How many heavy attacks did the 450 Luftflotte 2 conduct?
Answer:
1.0