pencil test
... that Sandra Laing was legally declared "coloured" largely on the basis of a pencil test, despite being born of two "white" parents?
... that <a href="./Sandra_Laing" id="mwDss" rel="mw:WikiLink" title="Sandra Laing">Sandra Laing</a> was legally declared "coloured" largely on the basis of a <b id="mwDsw"><a href="./Pencil_test_(South_Africa)" id="mwDs0" rel="mw:WikiLink" title="Pencil test (South Africa)">pencil test</a></b>, despite being born of two "white" parents?