Complex sentence: Bienville Square is a historic park dating to 1850 in the Lower Dauphin Street Historic District and is named for Mobile's founder, Jean-Baptiste Le Moyne, Sieur de Bienville.
Split into simpler sentences: Bienville Square is a historic park in the Lower Dauphin Street Historic District. It assumed its current form in 1850 and is named for Mobile's founder, Jean-Baptiste Le Moyne, Sieur de Bienville.