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Sem Koster
| Last name | Koster |
| First name | Sem |
| Gender | Male |
| Birthdate | 02.2001 |
| Country | NED |
| 500m | 43,29 (Enschede, 22.10.2016) |
| 1.000m | 1.28,88 (Haarlem, 31.10.2015) |
| 1.500m | 2.09,28 (Haarlem, 11.11.2017) |
| 3.000m | 4.32,27 (Enschede, 22.10.2016) |
| Sprint | 87,730 |
| Mini Combo | 176,201 |
| Tiny Combo | 130,823 |
| Latest update in | 2018 |
NED