<human>:  What are the main ingredients in a bolognese sauce?
<bot>: The main ingredients in a bolognese sauce typically include ground beef, onions, garlic, carrots, celery, tomato sauce or puree, white wine, and a small amount of milk or cream. Additional ingredients can include mushrooms, herbs such as oregano, basil and thyme, and sometimes even a small amount of bacon or prosciutto.