Given the task definition and input, reply with output. This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.

In 1936, when Tito stayed at the Hotel Lux in Moscow, he met the Austrian comrade Lucia Bauer. They married in October 1936, but the records of this marriage were later erased.
Where is the Hotel Lux located in Russia?