Complex sentence: The group, which certifies restaurants in Nice, sticks with Medicin's standards, rejecting commonly included ingredients such as green beans and potatoes, as well as innovations such as sweetcorn, mayonnaise, shallots and lemon.
Split into simpler sentences: The group, which certifies restaurants in Nice, sticks with Medicin's standards. They reject commonly included ingredients such as green beans and potatoes, as well as innovations such as sweetcorn, mayonnaise, shallots and lemon.