question: When did Microsoft make the existence of Windows 8.1 with Bing OEM SKU official ?
answer: May 23 , 2014
turker_answer: Microsoft made the existence of Windows 8.1 with Bing OEM SKU official on May 23 , 2014 .
rule-based: Microsoft made the existence of Windows 8.1 with Bing OEM SKU official in May 23 , 2014 .