Young person in black next to an older person in black and white polka dot.
A young person in black next to an older person.
"An older person in black and white polka dot" is a restatement of "an older person."
: A young person in black next to an older person is part of the total description of older person in black.
The person is next to an older person because he/she is next to an older person in black and white.