Instruct: Classify a given review as either positive or negative.
Query: A 5 star WWII submarine picture

"We Dive at Dawn" is a very good British production with an outstanding cast. Starring Sir John Mills, Louis Bradfield, Ronald Miller, Jack Waitling, Reginald Purdell, Caven Watson, Niall Macginnis and Eric Portman. An English language 97 minute B&W classic you do not want to miss. Get it now at Amazon.com before they all run out. I enjoyed the film very much and am sure you will also. Very realistic depiction of submarine action.