Question: Obva River - Obva (Russian: ) is a river in Perm Krai Russia. Right tributary of Kama river. It starts in the Upper Kama Upland in the west part of Sivinsky District near the border of Kirov oblast. Flows into Kama Reservoir in 780 km from confluence Kama and Volga. It is 247 km long. Drainage basin is 6720 km2. Frozen from late October to late April or early May. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
Answer:
Natural Place