そぼ
grandmother (my own)
sobo
JMdict 1396860
そぼの祖母のgrandmaいえ家houseにいく行くgo
の ('s) links two nouns to show possession or belonging — 祖母そぼ (grandma) + の ('s) + 家いえ (house) means “grandma's house.” Then に (to) marks the destination of 行くいく (go): the direction you're heading.
hanamaru