Question: What is an example of the marine vessel classification German Type U 31?
Answers:
answer_text: SM U-31
answer_text: SM U-33
answer_text: SM U-37
answer_text: SM U-41
answer_text: SM U-38
answer_text: SM U-34
answer_text: SM U-35
answer_text: SM U-40
answer_text: SM U-39
answer_text: SM U-36
answer_text: SM U-32