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:
| Result | Date | Race | Venue | Group | Distance | Weight (kg) | Jockey | Winner/2nd |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 6th | 30 Aug 2003 | HDF McNeil Stakes | Caulfield | G3 | 1100 m | 54 | P. Mertens | 1st - Cahuita |
| 2nd | 10 Sep 2003 | 3yo Hcp Restricted | Bendigo | NA | 1300 m | 56.5 | B. Prebble | 1st - Flash in the Pan |
| Won | 21 Sep 2003 | Guineas Prelude | Caulfield | G3 | 1400 m | 54 | B. Prebble | 2nd - In Top Swing |
| 5th | 11 Oct 2003 | Caulfield Guineas | Caulfield | G1 | 1600 m | 55.5 | B. Prebble | 1st - In Top Swing |
| 2nd | 25 Oct 2003 | AAMI Vase | Moonee Valley | G2 | 2040 m | 55.5 | P. Payne | 1st - Kempinsky |
| Won | 1 Nov 2003 | Victoria Derby | Flemington | G1 | 2500 m | 55.5 | D. Oliver | 2nd - Kempinsky |
| 5th | 17 Jan 2004 | Zeditave Stakes | Caulfield | LR | 1200 m | 58 | P. Payne | 1st - St Elmo's Fire |
| 3rd | 31 Jan 2004 | Debonair Stakes | Flemington | G3 | 1410 m | 57.5 | D. Oliver | 1st - Starcraft |
| 5th | 14 Feb 2004 | Australian Guineas | Flemington | G1 | 1600 m | 55.5 | D. Oliver | 1st - Reset |
| Won | 28 Feb 2004 | Autumn Classic | Caulfield | G2 | 1800 m | 55.5 | D. Oliver | 2nd - Delzao |
| 3rd | 8 Mar 2004 | Australian Cup | Flemington | G1 | 2000 m | 53.5 | D. Oliver | 1st - Lonhro |
| 3rd | 27 Mar 2004 | Rosehill Guineas | Rosehill | G1 | 2000 m | 56.5 | D. Oliver | 1st - Neillo |
| 6th | 3 Apr 2004 | The BMW Stakes | Rosehill | G1 | 2400 m | 53.5 | D. Oliver | 1st - Grand Zulu |
Question:
What is the autumn classic weight?
Answer:
55.5