== Invitation to a research survey == 

 Hello Rtkat3, 
 I am Qi Wu, a computer science MS student at the University of Minnesota - Twin Cities. Currently, we are working on a project studying the main article and sub article relationship in a purpose of better serving the Wikipedia article structure. It would be appreciated if you could take 4-5 minutes to finish the survey questions. Thanks in advance! We will not collect any of your personally information. 

 Thank you for your time to participate this survey. Your response is important for us! 

 https://umn.qualtrics.com/SE/?SID=SV_bvm2A1lvzYfJN9H 

 Here is the link to our Meta:Research page. Feel free to sign up if you want to know the results! https://meta.wikimedia.org/wiki/Research:Main/sub-article_relationship