generate questions: After the preamble comes numbered articles, which contain the substance of the parties' actual agreement. Each article heading usually encompasses a paragraph. A long treaty may further group articles under chapter headings.
What follows the preamble in a treaty? {sep_token} What is contained in the numbered articles of a treaty? {sep_token} What does each article heading usually encompass? {sep_token} How might the articles in a long treaty be grouped? {sep_token} The numbered articles of a treaty may be grouped by chapter heading in what kind of treaty?