Assertion: vowel | /r/CapableOf | shift to central position
Facets:
value: since
type: TEMPORAL
value: forward
type: MANNER
Source sentences:
text: Before the Second World War, the vowel of cup was a back vowel close to cardinal [ʌ] but has since shifted forward to a central position so that [ɐ] is more accurate; phonemic transcription of this vowel as /ʌ/ is still common largely for historical reasons.