Complex sentence: Because his daughter needed a warmer climate, the family relocated to newly annexed Hawaii in 1898, where he spent a very productive period before moving to Alameda, California, in 1907, where he retired in 1925 and died in 1932.
Split into simpler sentences: Because his daughter needed a warmer climate, the family relocated to the newly annexed Territory of Hawaii in 1898. In 1907, he moved to Alameda, California, where he retired in 1925 and died in 1932.