A young woman wearing a white sleeveless dress with red flowers is talking on her cellphone as she walks down a street.
A young woman wearing a yellow dress sitting in the sand at a packed beach.
The woman cannot simultaneously be wearing a white dress and a yellow dress
A woman wearing a white dress is not wearing a yellow dress.  If a woman walks down the street she is not sitting in the sand at a beach.
a white dress is not the same as an yellow dress