Complex sentence: The Forum Cuppedinis in ancient Rome was a market which offered general goods while at least four other large markets specialized in particular goods such as cattle, wine, fish and herbs and vegetables, and the Roman forum drew the bulk of the traffic.
Split into simpler sentences: The Forum Cuppedinis in ancient Rome was a market which offered general goods. At least four other large markets specialized in specific goods such as cattle, wine, fish and herbs and vegetables, but the Roman forum drew the bulk of the traffic.