Complex sentence: Honigman was born in Russia and emigrated to the United States in 1911 with his mother where he was reunited with his father who had emigrated to the United States at an earlier time.
Split into simpler sentences: Honigman was born in Russia and emigrated to the United States in 1911 with his mother. After arriving in the United States, he was reunited with his father who had emigrated to the United States at an earlier time.