Knowledge: The cost of taking a bridge tour in San Francisco is around $50 for half day and much more for full day, $120. On the other hand, wine tasting in the Bay area is around $150.

Conversation:
Is it true wine tasting is a delicate art?
I'm unaware if it is or not, but there have been scientific blinding wine tastings that contradict wine tasting reliability.
What do you mean by reliability?
I can't say but the purpose of the blinding tastings is for wine scientists exploring the human olfactory system on things like identifying the compounds of a wine's aroma.
Ah okay. Do you know how much it cost in San Fransico?

Response: Sure, it cost about $150 in San Francisco.