In this task, You are given an open-domain question that can be answered based on factual information. Your task is to provide \*short\* answer (in a few words only) for the given question. The short answer can be one or more entities or it can also be boolean \*yes\* or \*no\*.
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Question: when were air brakes first used on trucks

Answer: the early 20th century


Question: when was the first superman comic book published

Answer: June 1938


Question: when do the new data protection laws come into effect

Answer:
25 May 2018