Definition: You are given a conversation between two people. 'Person1:' and 'Person2:' are used to separate their respective dialogues. If the conversation begins with a question, label it '1' otherwise '0'.
Input:  Person1:     Thank you.Steven.That was the most magnificent meal I've had abroad.You ' ll have to let me reciprocate the next time you're in Beijing .  
 Person2:  Don't worry about it , Lin.That ' s no big deal.You know , Americans appreciate China's rich culinary culture . Just excuse me for a second while I check the number here and figure out how much to give the waiter.Hmm , by the way , what do you do about tipping in China ?  
 Person1:      We don't .  
 Person2:  No tipping ? Now that's what I call a civilized system .  
 Person1:      At hotels and some restaurants they add a service charge to the bill , but other than that , tipping isn't customary .  
 Person2:  What about cab drivers and porters ?  
 Person1:      In a cab you just pay what it says on the meter . I generally tip hotel porters 10 yuan per bag , but in first-class hotels they're instructed not to accept gratuities .  
 Person2:  You'd have a revolution on your hands if you tried to introduce that sort of system here . 

0