question: When did MSDN and TechNet users gain access to Windows 8.1 ?
answer: September 9 , 2013
turker_answer: MSDN and TechNet users gained access to Windows 8.1 on September 9 , 2013 .
rule-based: MSDN and TechNet users gained access to Windows 8.1 in September 9 , 2013 .