Detailed Instructions: Given a paragraph, your job is to generate a question that can be answered from the passage. The answer to your question should be a single entity, person, time, etc. that can be extracted from the passage.
Q: However, his religious views remain uncertain due to other statements that he made. For example, in his article, 'A Machine to End War', published in 1937, Tesla stated:
A:
What article was published in 1937?