private String verifyCategories(String keyword) {
		switch (keyword) {
		case "beef":
		case "cow":
			return "cow";
		case "fish":
			return keyword; // no changes
		case "veg":
		case "vegetarian":
			return "veg";
		case "vegan":
			return keyword; // no changes
		case "pork":
			return keyword; // no changes
		default:
			return "no_category";
		}
	}