Assertion: apostrophe | /r/HasProperty | unvoiced single vowels
Facets:
value: often
type: TEMPORAL
Source sentences:
text: To make things even more confusing, people refused to agree on exactly which letters should be replaced with an apostrophe; often it was unvoiced single vowels, but occasionally it was larger pieces of a word, such as the re and as of fo’c’sle.