Complex sentence: In 1924 her parents divorced and her mother remarried artist John Roberts, whose house was in the same block as Robert Disney's house, uncle of Walt Disney, where Roy and Walt Disney lived when they first came to Los Angeles.
Split into simpler sentences: In 1924 her parents divorced and her mother remarried artist John Roberts, whose house was in the same block as the house of Robert Disney, uncle of Walt Disney. This is where Roy and Walt Disney lived when they first came to Los Angeles.