Knowledge: To attend Formula 1 in Las Vegas, it cost about $1000 per person. On the other hand, vegfest 2015 requires $150 to participate in the festival.

Conversation:
I am a vegan, how about you?
I am a bot so that wouldn't be posible, but speaking of veganism, when did you started not using animal products in diet ?
I am actually a new comer to veganism. I have some ethical vegan friends.
Very interesting. Your friend as an ethical vegan certainly follow the vegan diet as well but also refuses to use animals for not a single purpose.
That is correct. He became a vegan at the vegfest 2015, but I don't know what that was.
Let me tell you then, vegfest 2015 was an event organized by the Ghana vegetarian association.
That sounds like a great idea. Do you know how much it costs to attend that?

Response: Hmm, it cost $150 to attend the festival.