What is the oldest age, in years, that Selim Zilkha's retailer caters to for children? 
Selim Zilkha: Selim Zilkha (born 1927) is an Iraqi-born British entrepreneur, who founded Mothercare, one of the UK's largest retail chains. Mothercare: Mothercare plc () is a British retailer which specialises in products for expectant mothers and in general merchandise for children up to 8 years old.
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