Simplify the following text for a Grade 8 native English-speaking person.
Original: Epiphanius ( Haeres 62 ) about 375 notes that the adherents of Sabellius were still to be found in great numbers , both in Mesopotamia and at Rome .
Simplified: Epiphanius ( Haeres 62 ) about 375 AD notes that Sabellius still had many followers , both in Mesopotamia and at Rome .