Question: 2015 Idlib offensive refers to a series of rebel operations and is mentioned in the English-language weekly magazine-format newspaper edited where?

Related documents: [0]  [DOC] The Economist is an English-language weekly magazine-format newspaper owned by the Economist Group and edited at offices in London. Continuous publication began under its founder, James Wilson, in September 1843. In 2015 its average weekly circulation was a little over 1.5 million, about half of which were sold in the United States. [END] 
[1]  [DOC] The 2015 Idlib offensive refers to a series of rebel operations in the Idlib Governorate, during the Syrian Civil War. The offensive started with a rebel assault on the capital of the province, Idlib. According to "The Economist", the capture of Idlib came about largely because Gulf Arab states "gave more backing to their proxies despite American objections." [END]  
Answer: London
London