I want to test the ability of students to read a passage and answer questions about it. Could you please come up with a good question for the passage "The overcrowded conditions of the library was one of the reasons why the RIBA moved from 9 Conduit Street to larger premises at 66 Portland Place in 1934. The library remained open throughout World War Two and was able to shelter the archives of Modernist architect Adolf Loos during the war."? 

What was the time frame when the location was changed?