Simplify the following text for a Grade 10 native English-speaking person.
Original: Portishead consists of Geoff Barrow , Beth Gibbons , and Adrian Utley , while sometimes citing a fourth member , Dave McDonald , an engineer on Dummy and Portishead .
Simplified: Portishead is Geoff Barrow , Beth Gibbons , and Adrian Utley , while sometimes using a fourth member Dave McDonald ; an engineer on Dummy .