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:     Do you know Mark ?  
 Person2:  Yeah ! He is a nice guy . He is very helpful and always bends over backward to help those who are in need of help .  
 Person1:      Can you introduce him to me ?  
 Person2:  Sure . 

1