Simplify the following text for a Grade 9 native English-speaking person.
Original: In the yearly Howard Hughes Medical Institute Scientific Meeting held on November 13 , 2006 in Ashburn , Virginia , Professor Mello talked about the phone call that he received telling him he had won the Nobel Prize .
Simplified: In the annual Howard Hughes Medical Institute Scientific Meeting held on November 13 , 2006 in Ashburn , Virginia , Dr. Mello recounted the phone call that he received announcing that he had won the prize .