If you know where the lady is from, you can refer to her as the Columbian or the South American. If you don't know where she is from you refer to her as the woman or the woman in the red dress or ....

When you refer to the woman as Asian or Oriental - you are identifying her on the basis of physical characteristics which probably includes skin colour.

There are alot of people of colour in this world. To guess where they are from, based on the color of their skin is racist.

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