Complex sentence: The company required bars that bought Campari to display the "Campari Bitters" sign; under the direction of Davide Campari, Gaspare's son, the company began to export the brand, first to Nice, the heart of the French Riviera, then overseas.
Split into simpler sentences: The company required bars that bought Campari to display the "Campari Bitters" sign. Under the direction of Davide Campari, Gaspare's son, the company began to export the beverage, first to Nice in the heart of the French Riviera, then overseas.