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1. The discussion between Sir John and James got over by 10 p.m.
   
 
2. James doubted that scientists and professionals from around the world would be invited to a conference in less than a week.
   
 
3. Astronomers, computer scientists, nuclear physicists, space technologists, and biologists were all present at the international conference.
   
 
4. Manoj Dutta was not invited to the international conference.