21.   This is a national phenomenon.

22.   While this is a national phenomenon, it is particularly acute in Massachusetts, where there are nine law schools and an attractive standard of living, Beck said.

23.   Yet his rise is only part of a larger national phenomenon that crosses racial lines.

24.   It became a national phenomenon even before its release.

25.   The problem appears to be a national phenomenon.

26.   The Red Devils have not the same tradition as Japans Ultra Nippon but their passionate support for the national team has quickly grown into a national phenomenon.