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:
| Year | Competition | Venue | Position | Event | Notes |
| --- | --- | --- | --- | --- | --- |
| 1999 | Universiade | Palma de Mallorca, Spain | 2nd | 20 km | 1:25:23 |
| 2001 | European Race Walking Cup | Dudince, Slovakia | 12th | 20 km | 1:22:10 |
| 2001 | World Championships | Edmonton, Canada | 16th | 20 km | 1:25:28 |
| 2001 | Universiade | Beijing, China | 1st | 20 km | 1:24:42 |
| 2002 | European Championships | Munich, Germany | 9th | 20 km | 1:21:21 |
| 2002 | World Race Walking Cup | Turin, Italy | 12th | 20 km |  |
| 2003 | World Championships | Paris, France | 11th | 20 km | 1:20:34 PB |
| 2005 | World Championships | Helsinki, Finland | 14th | 20 km |  |
Question:
how many placed did lorenzo improve between his edmonton and beijing competition?
Answer:
15