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:     Which do you like better , orange or lemon ?  
 Person2:  I like orange better .  
 Person1:      Why ?  
 Person2:  Because orange is much more to my taste . 

1