Assertion: vowel | /r/HasProperty | silent
Facets:
Source sentences:
text: In other languages (including English, though it's rare) the two dots are called a diaeresis, and simply mean that a vowel than might be silent or part of a diphthong is in fact pronounced.
text: It either means absense of any vowel ("silent schwa"); or a reduced unstressed vowel, something like the "a" in "about" ("moving schwa".)