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Siewart Sjoerd Wiersma
| Last name | Wiersma |
| First name | Siewart Sjoerd |
| Gender | Male |
| Birthdate | 06.1995 |
| Country | NED |
| 500m | 43,03 (Heerenveen, 03.02.2014) |
| 1.000m | 1.26,12 (Heerenveen, 03.02.2014) |
| 1.500m | 2.15,35 (Heerenveen, 21.10.2013) |
| 3.000m | 4.39,28 (Heerenveen, 02.02.2014) |
| 5.000m | 8.04,90 (, ) |
| Sprint | 86,090 |
| Small Combo | 183,182 |
| Mini Combo | 177,752 |
| Tiny Combo | 131,206 |
| Latest update in | 2014 |
NED