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:     David , recently I established a travelling forum , and now I want to make a plan to hold the first activity . Where can we go for this time ?  
 Person2:  How many members are there in your forum ?  
 Person1:      a dozen .  
 Person2:  I think we can visit West Lake . The landscapes are attractive . It is said that just as there is paradise in heaven , there are Su Thou and Hang Thou on earth .  
 Person1:      It's surely worth going to . There are ten famous spots there .  
 Person2:  What can we do next after locating the place ?  
 Person1:      Inform my members to prepare for the travelling . And then we can discuss about the travelling costs . 

1