Assertion: close vowel | /r/CapableOf | shift to become diphthong
Facets:
Source sentences:
text: In Southern English, the close vowels /iː/ in bite and /uː/ in house shifted to become diphthongs, but in Northern English,
text: In Southern English, the close vowels /iː/ in bite and /uː/ in house shifted to become diphthongs, but in Northern English,