Original: 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.
Simplified: 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.