Question: What is the name of the grandma who is featured in the 2016 film starring Cha Hak-yeon?

Related documents: [0]  [DOC] Cha Hak-yeon (Hangul: 차학연 , born June 30, 1990), better known by his stage name N (Hangul: 엔 ), is a South Korean singer, actor, presenter, and radio host, signed under Jellyfish Entertainment. Debuted as a member of the South Korean boy group VIXX in May 2012, he began his acting career in 2014 in MBC's romantic-melodrama "Hotel King" as Noah. He has since had roles in "The Family is Coming" (2015), "Cheer Up!" (2015) and "Tomorrow Boy" (2016). N began his career as a radio host in May 2015 with his show "VIXX N K-pop" on SBS Power FM. [END] 
[1]  [DOC] Ahn Tae-pyung (N) is the eldest among four orphaned siblings living with their grandmother (Moon Hyung-joo). He is a high school student but takes up part-time jobs and also sells ddeokbokki in order to clear his dead father's debts and to take care of his younger siblings and grandmother. During a robbery at a burger shop, he saves Ah-ra (Kang Min-ah) from being taken hostage. Since then Ah-ra, a rich girl from another school, has taken a liking for Tae-pyung. She would follow him whenever possible, would try to get his attention, and also try to impress him. The drama ends with Ah-ra trying to find out who is the guy whom Shin-young (Moon Ji-in), the credit union boss of Tae-pyung, is interested during Tae-pyung's birthday celebration at his house. [END]  
Answer: Moon Hyung-joo
Moon Hyung-joo