11. The star chromatic number has been proved to be bounded on every proper minor closed class by. 12. Pro-form locative adverbs generally form a closed class and are particularly important in a language. 13. Basque verbs are also a closed class , with the vast majority of verbal senses instead expressed periphrastically. 14. Inventory control is typically manipulated from here, using availability feeds to open and close classes of service. 15. However, it also has numerous closed classes including fourteen adjectives, adpositions, interjections, conjunctions and demonstratives. 16. Conversely, pronouns are closed classes in Western languages but open classes in Japanese and some other East Asian languages. 17. A warm wind caused the flag to flutter and, finally, Dilma Lopes stood to give the closing class speech. 18. There are also several small closed classes , such as pronouns, prepositions, French " voil?" ). 19. In the Bantu languages, the adjectives form a closed class ( with some languages having no proper adjectives at all ). 20. Klaus Wagner asked more generally whether any minor-closed class of graphs is determined by a finite set of " forbidden minors ".