The order of prenominal adjectival modiﬁers in English is governed by complex and difﬁcult to describe constraints which straddle the boundary between competence and performance. This paper describes and compares a number of statistical and machine learning techniques for ordering sequences of adjectives in the context of a natural language generation system. the large red American car ??the American red large car *car American red the large Some orders are more marked than others, but none are strictly speaking ungrammatical. .