sentences:  In 1992, the top five chains accounted for less than 20% of all grocery sales, but as mass retailers like Walmart began to sell groceries, the dynamics in the industry changed.In order to compete, supermarket chains had to become larger as well, and a wave of major mergers took place.By the mid-1990s, the company was servicing 27 markets and employed over 2,000 and held a leading position in the Southeast, seeking growth beyond its core region and the traditional CPG sales and marketing agency business.