Complex sentence: In July 2004, Wal-Mart acquired Amigo Supermarkets located in Puerto Rico, they are very similar to the Neighborhood Markets, but the store name remains as Amigo and employees use Wal-Mart ID tags to identify themselves.
Split into simpler sentences: In July 2004, Wal-Mart acquired Amigo Supermarkets in Puerto Rico. The employees use Wal-Mart ID tags to identify themselves.