Chicken Andouille Gumbo

Name: Chicken Andouille Gumbo
Ingredients: 12 cups water; 3 pounds chicken parts; 2 tablespoons vegetable oil; 1.5 pounds okra; 0.5 cup vegetable oil; 0.5 cup all-purpose flour; 1 pound andouille sausage, sliced; 1 (28 ounce) can Italian-style whole peeled tomatoes; 1 green bell pepper, chopped; 2 stalks celery, chopped; 2 cloves garlic, minced; 1 bay leaf; 2 teaspoons salt; 1 teaspoon dried thyme; 1 teaspoon dried basil; 1 teaspoon cayenne pepper; 1 teaspoon ground black pepper; 1 teaspoon file powder