I am trying to learn more about the history of vegetarianism, are you vegan by any chance?
I'm vegetarian! The practice of not eating meat has roots in ancient Indian and Greece civilizations. 
OK and it means not eating meat but what about eggs cheese or milk?
Some vegetarians will eat milk and eggs ad even sea animals like fish. 
What about shellfish?
Yes, some vegetarians will eat exoskeleton-bearing aquatic invertebrates like mulluscs and crustaceans. Do you like shellfish?