Knowledge: Eating meat every day has a lot of health benefit like stronger bone, more muscle and better brain. On the other hand, consuming kale is very good for the body as it has high vitamin A, C, calcium and promotes liver health.

Conversation:
Kale is so good for you. I try to eat it every day.
Nice! I know that kale leaves don't make a head, like headed cabbages do.  Also, their leaves can be purple or green!
Oh cool.  Do you know anything about the history of kale?
Well, in Europe it was very common up until Middle Ages' end.  In fact, of the green vegetables, it was the most common!
Wow! I guess it's a really hardy plant.
I actually don't know about that.  But even further back, in the 4th century BC, curly and flat leaved types of cabbage were known to already exist, in Greece.
Interesting. So tell me about the health benefit of eating that.

Response: Yeah! Kale is very good for the body as it has high vitamin A, C, calcium and promotes liver health.