A woman carrying a large package on her head walks in front of a building plastered with Portuguese posters advertising a concert.
A Brazilian woman carries groceries home.
Brazilian is just one nationality.  Groceries are only one thing that could be in a package.
Just because a woman carrying a large package on her head walks in front of a building plastered with Portuguese posters advertising a concert, doesn't mean she is Brazilian.
A woman doesn't imply Brazilian. Packages doesn't imply groceries.