Given the task definition and input, reply with output. Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.

Context: Kim Sul-song, or Kim Seol-song (born December 30, 1974), is the daughter of North Korea's former leader Kim Jong-Il and Kim Young-sook.
Question: Which lady Kim Sul-song was born to?
kim young-sook