Complex sentence: After the sudden death of his wife in 1921, Monroe decided to build a good Christian home for working girls that would serve the needs of the community and would also be a fitting memorial to his wife.
Split into simpler sentences: After the sudden death of his wife in 1921, Monroe decided to build a memorial to honor her. He felt a good Christian home for working girls would serve the need of the community and would also be a fitting memorial to his wife.