Question: Which MBC show aired in the same Sunday night slot before April 2015 as "Secretly Greatly" did from December 2016?
Sentence (from "Secretly Greatly (TV series)"): Secretly Greatly () is a 2016 South Korean television program starring by Yoon Jong-shin, Lee Soo-geun, Kim Hee-chul, Lee Guk-joo and John Park.
Relevant evidence: No