Claim: The Msta is a river in Russia with a length of 445 km (277 mi) and a basin size of 23,300 km (9,000 sq mi).
Evidence: The Msta (Russian: Мста) is a river in Vyshnevolotsky, Udomelsky, and Bologovsky Districts of Tver Oblast and in Borovichsky, Okulovsky, Lyubytinsky, Malovishersky, Krestetsky, and Novgorodsky Districts, as well as in the town of Borovichi of Novgorod Oblast of Russia. It is 445 kilometres (277 mi) long, and the area of its basin 23,300 square kilometres (9,000 sq mi). 
Russia 445 km (277 mi) 23,300 km (9,000 sq mi)