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:     Good evening , miss . Want some socks ? 
 Person2:  Yes.Do you sell stockings ? 
 Person1:      Yes.But I recommend you to buy pantyhose . The stockings are already out-dated . 
 Person2:  Sure . Are those pantyhose made of artificial silk ? 

1