Given the task definition and input, reply with output. In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.

Passage: The year is 1965, and 10-year-old Sandra and her parents, Abraham and Sannie, are white Afrikaners. Her parents are shopkeepers in a remote area of the Eastern Transvaal and, despite Sandra's mixed-race appearance, have lovingly brought her up as their white little girl. Sandra is sent to a boarding school in the neighbouring town of Piet Retief, where her (white) brother Leon is also studying, but parents of other students and teachers complain that she does not belong.
She is examined by State officials, reclassified as coloured, and expelled from the school. Sandra's parents are shocked, but Abraham fights through the courts to have the classification reversed. The story becomes an international scandal and media pressure forces the law to change, so that Sandra is classified as officially white again.
By the time she is 17, Sandra realises she is never going to be accepted by the white community. She falls in love with Petrus, a young black man and the local vegetable seller, and begins an illicit love affair. Abraham threatens to shoot Petrus and disown Sandra. Sannie is torn between her husband's rage and her daughter's predicament. Sandra elopes with Petrus to Swaziland. Abraham alerts the police, and has them arrested and put in prison for the illegal border crossing. Sandra is released by the local magistrate to return home with her parents, but she decides to return to Petrus, as she is pregnant with his child. Her father disowns her.
Whose parents are shopkeepers?