What is the fine-grained topic of the following text: In the 1970’s as interest in wines, beers and spirits grew in Ireland, the O’Brien group started to sell a wider range of these products and in 1970 the group bought their second store in Co. Wicklow, 25 years after arriving in Bray. Only return the topic.
O'Brien group's expansion in Ireland's alcohol market in the 1970s