Classify the below places based on whether they are mountains or river.
Everest, Niles, Hudson, Nanga Parbat
Everest, Nanga Parbat - Mountains
Niles, Hudson- River
<START_INST>Classify the below places based on whether they are mountains or river.
Everest, Niles, Hudson, Nanga Parbat<END_INST><START_CTX><END_CTX><START_A>Everest, Nanga Parbat - Mountains
Niles, Hudson- River<END_A>