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:     Hectic . It's always hectic . But how was your windsurfing ?  
 Person2:  I tried it for a half-hour.It was interesting , but ... well ... I couldn't really do it .  
 Person1:      See ? I told you . It's very hard .  
 Person2:  I couldn't even stand on it and hold the sail . I probably fell down fifty times .  
 Person1:      Fifty times ?  
 Person2:  Yes , it was really stupid .  
 Person1:      And how much did it cost to rent it ?  
 Person2:  It was fifty dollars for a half-hour .  
 Person1:      Well , that's not too bad then .  
 Person2:  What do you mean ? It's expensive !  
 Person1:      Yes , but you have to calculate a little.You paid fifty dollars and you fell down fifty times.So you only spent one dollar per fall . That's cheap . 

1