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:     Hey , Mike . You've been surfing the Net for quite a while . What on earth are you searching for ? 
 Person2:  It's something relative hackers . I often hear people talking about them , but I don't know much about them . 
 Person1:      Well , roughly speaking , a hacker is a computer buff . 
 Person2:  You mean a guy using enthusiastic and knowledgeable about the computer ? 
 Person1:      You can say that . 
 Person2:  But why are people always having such a negative attitude towards them ? 
 Person1:      They must have mixed hackers with crackers . 
 Person2:  What is crackers then ? 
 Person1:      There is another group of people who loudly call themselves hackers , but they aren't . They break into computers and break the phone system . Real hackers call these people crackers , and want nothing to do with them . 
 Person2:  So they are two totally different concepts . 
 Person1:      Well , the real hackers mostly think crackers are lazy , irresponsible and not very bright , and feel that being able to break security does make you a hacker any more than being able to start cars without keys makes you an automotive engineer . Unfortunately , many journalists and writers have been fooled into using the word hacker to describe crackers . This irritates real hackers to no end . 
 Person2:  I see . Then the basic different is , hackers build things , crackers break them . 
 Person1:      You got it . 
 Person2:  Thanks a lot . 
 Person1:      You are welcome . 

1