Complex sentence: The summer home of the MP for Great Grimsby, Austin Mitchell, is situated in the town, and the mansion of Fieldhouse was the seat of the Stansfeld family, who contributed much to the local community, including building St Peter's church.
Split into simpler sentences: The summer home of the MP for Great Grimsby, Austin Mitchell, is situated in the town. The nearby mansion of Fieldhouse was the seat of the Stansfeld family, who contributed much to the local community, including building St Peter's church.