Premise: Moscow is the capital and most populous city of Russia , with 13.2 million residents within the city limits and 17.8 million within the urban area . Moscow is the northernmost and coldest megacity and metropolis on Earth . The city is served by a transit network , which includes four international airports , nine railway terminals , numerous trams , a monorail system and one of the deepest underground rapid transit systems in the world , the Moscow Metro , the fourth-largest in the world and largest outside of Asia in terms of passenger numbers , and the busiest in Europe .
Hypothesis: Moscow is a city.
Label: ENTAILMENT