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:     How was the party last night ? Did you enjoy it ?  
 Person2:  Oh , don ’ t talk to me about last night ! It was the most awful evening I ’ Ve ever had .  
 Person1:      Why ? What happened ?  
 Person2:  Well . Mary had promised to be my date , but she stood me up . I waited for her for a full hour in the cold wind .  
 Person1:      What about the party ?  
 Person2:  It was boring . The music was too slow and the food was lousy and , above all , I was really sick of the same old crowd all the time .  
 Person1:      So how long did you stay ?  
 Person2:  I left after the opening dance . I couldn ’ t wait to get out of there . 

1