Painting by Georgia O'Keeffe
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Artist Georgia O'Keeffe's work at Tate Modern

Georgia O'Keeffe was one of the most significant artists of the 20th century, and the most popular female American artist of her time.

Her works are rarely seen in the UK, but more than 100 paintings are going on display in a major new exhibition at London's Tate Modern.

Will Gompertz reports.

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