Given the task definition and input, reply with output. 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'.

Context: Fort Mercer was a fort on the Link Information: A 102.5-mile stretch of this federal navigation channel, from Philadelphia and Camden to the mouth of the Delaware Bay, was deepened to 45 ft Question: How deep is the body of water near which Fort Mercer was located?
Answer: 45 ft,