The Sentences(s) command attempts to split a string, presumed to be composed of English language text, into its constituent sentences. It does this by recognizing sentence boundaries. The beginning and the end of the input string are regarded as sentence boundaries in all cases. Internal sentence boundaries are recognized by the presence of a sentence terminator, which is one of the following:

A small number of built-in patterns are used to recognize some exceptions.

Note that you can also use the RegSplit command with the fixed string "\n\n" as the splitting pattern to segment English text into paragraphs.