Complex sentence: The term "ale" was initially used to describe a drink brewed without hops, unlike "beer", Oxford English Dictionary Online although it eventually came to mean a bitter-tasting barley beverage fermented at room temperature.
Split into simpler sentences: The term "ale" was initially used to describe a drink brewed without hops, unlike "beer" Oxford English Dictionary Online. It has often now come to mean a bitter-tasting barley beverage fermented at room temperature.