Detailed Instructions: In this task, you're given a statement, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.
Problem:Context: While other groups migrated, the Polanie remained in situ along the Vistula, from the river's sources to its estuary at the Baltic Sea. Link Information: The maximum depth is 459 m which is on the Swedish side of the center Question: What is the maximum depth of the water body where the Vistula river flows to its estuary?
Solution:
Answer: 459 m