Assertion: comma | /r/CapableOf | separate element
Facets:
value: before the coordinating conjunctions
type: TEMPORAL
value: within a sentence
type: OTHER
Source sentences:
text: A comma is a punctuation mark that separates elements and ideas within a sentence.
text: A serial comma simply means that a comma will separate each element in a series of three or more, even before the coordinating conjunctions "and" and before "or.