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 | Denomination | Alloy | Reverse | Diameter | Weight | Obverse | Mintage | Series |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 2007.0 | 1 Yuan | Brass | Weightlifting | 25mm | 6.75 gr | Emblem of the XXIX Olympiad, and the year 2008. | 10000000.0 | I series |
| 2007.0 | 1 Yuan | Brass | Swimming | 25mm | 6.75 gr | Emblem of the XXIX Olympiad, and the year 2008. | 10000000.0 | I series |
| 2008.0 | 1 Yuan | Brass | Archery | 25mm | 6.75 gr | Emblem of the XXIX Olympiad, and the year 2008. | 10000000.0 | II series |
| 2008.0 | 1 Yuan | Brass | Gymnastics | 25mm | 6.75 gr | Emblem of the XXIX Olympiad, and the year 2008. | 10000000.0 | II series |
| 2008.0 | 1 Yuan | Brass | Table tennis | 25mm | 6.75 gr | Emblem of the XXIX Olympiad, and the year 2008. | 10000000.0 | II series |
| 2008.0 | 1 Yuan | Brass | Fencing | 25mm | 6.75 gr | Emblem of the XXIX Olympiad, and the year 2008. | 10000000.0 | III series |
| 2008.0 | 1 Yuan | Brass | Football | 25mm | 6.75 gr | Emblem of the XXIX Olympiad, and the year 2008. | 10000000.0 | III series |
Question:
what's the series with reverse being swimming
Answer:
I series