Complex sentence: In 1902, Edna Jeffrey's father Matti Finnila (Finnish spelling: Finnilä) immigrated from Kalajoki, Finland to Los Angeles, California, sponsored by his brother, who owned a baking oven manufacturing business in Los Angeles.
Split into simpler sentences: In 1902, Matti Finnila (Finnish spelling: Finnilä) immigrated from Kalajoki, Finland to Los Angeles, California. He was sponsored by his brother, who owned a baking oven manufacturing business in Los Angeles.