Complex sentence: Family man Lee Shi-mak arrives at an art exhibition only to find the building empty, and is shocked to find a portrait of his ex-wife, Ae-ja, whom he has not seen for ten years.
Split into simpler sentences: Family man Lee Shi-mak arrives at an art exhibition, only to find the building empty. He is shocked to find a portrait of his ex-wife, Ae-ja, whom he has not seen for ten years.