Question:
Which employer did Roman Badanin work for in Dec, 2011?

Context:
 Roman Badanin works for RBC Information Systems from Jan, 2014 to May, 2016. 
 Roman Badanin works for Dozhd from Jul, 2016 to Jun, 2018. 
 Roman Badanin works for Proekt from Jan, 2018 to Dec, 2022. 
 Roman Badanin works for Forbes (Russia) from Dec, 2011 to Aug, 2013. 
 Roman Badanin works for gazeta.ru from Jan, 2001 to Nov, 2011. 
 Roman Badanin works for Interfax from Oct, 2013 to Jan, 2014.

Answer:
Forbes (Russia)