Chicken n Beef Andouille Sausage Gumbo

Name: Chicken 'n Beef Andouille Sausage Gumbo
Ingredients: 1 (2 to 3 pound) whole chicken; 1 tablespoon butter; 1 large onion, chopped; 1 green bell pepper, chopped; 2 stalks celery, chopped; 3 cloves garlic, minced; 1 (14.5 ounce) can diced tomatoes; 2 cups sliced andouille sausage; 2 cups okra; Salt to taste; Ground black pepper to taste; ½ teaspoon cayenne pepper; 1 cup uncooked medium shrimp, peeled and deveined (Optional); 2 teaspoons file powder; 4 cups cooked rice