Given the task definition and input, reply with output. 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'.

 Person1:     What ’ s “ pi ” ?  
 Person2:  That ’ s the ratio of the circumference of a circle to its diameter , I think .  
 Person1:      I see . What is that ratio exactly ?  
 Person2:  It ’ s approximately 3.14 , but the number continues forever . What ’ s the diameter of your circle ?  
 Person1:      It ’ s 10 centimeters , so the circumference should be 31.4 centimeters .  
 Person2:  Ok . My next problem is to convert 10000 british pounds into us dollars . What ’ s the exchange rate at the moment ?  
 Person1:      According to the newspaper , the exchange rate is 1.85 dollars to the pound .  
 Person2:  That means that 10.000 pounds will buy me 18.500 dollars .  
 Person1:      What ’ s the next question .  
 Person2:  Fractions . What ’ s a quarter and an eighth ? That ’ s three-eights . Easy . The next question is “ what are prime numbers ? ” .  
 Person1:      I can help you there . Those are numbers that cannot be created by multiplying two whole numbers , apart from the number itself and 1 , together .  
 Person2:  So , 1,2 and 3 are prime numbers , but 4 isn ’ t because 2 * 2 = 4 .  
 Person1:      Exactly . Anything else ?  
 Person2:  How many seconds in an hour ? 60 seconds multiplied by 60 minutes equals 3600 seconds altogether .  
 Person1:      You ’ ll be a mathematician one day . 

1