Knowledge: Starbucks earned the most money compared to all coffee shops. On the other hand, L'oreal made the most money among the hair coloring companies.

Conversation:
I love to color my hair. I recently colored it purple.
How interesting! Did you do it yourself or did you go to a professional?
I did it myself at home. Do you have any advice on how to maintain it?
I don't have any advice. What I can tell you is that in 2011 alone, at-home coloring in the US reached 1.9 billion dollars.
Wow, that's a lot of money. Do you know which hair color brand earned the most?

Response: Sure, L'oreal is the brand that earned the most money.