The temperature in five cities is shown 
in the table. What is the difference 
between the highest and the lowest 
temperature ?
| City | Temperature | 
| Lemon | (12 °C) | 
| Frankfurt | (0 °C) | 
| Helsinki | (-13 °C) | 
| London | (2 °C) | 
| Paris | (-1 °C) | 
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