Simplify the following text for a Grade 14 native English-speaking person.
Original: By late on September 3 , the system maintained a broad closed circulation and enough convective organization to be classified Tropical Depression Six while located about midway between the Lesser Antilles and Africa .
Simplified: By late on September 3 , the system maintained a large closed circulation and enough convective organization to be named Tropical Depression Six while located about midway between the Lesser Antilles and Africa .