For instance , Subway has become a densely populated fast food franchise .
The opening of Wal - Mart stores has resulted in internal competition with separate Subway restaurants nearby since Subway has been integrated into Wal - Mart stores .
For instance , Subway has become a densely populated fast food franchise , and the opening of Wal - Mart stores has resulted in internal competition with separate Subway restaurants nearby since Subway has been integrated into Wal - Mart stores .