Sentences splitting regex patterns

pattern

Pattern pattern = Pattern.compile(
                "# Match a sentence ending in punctuation or EOS.\n" +
                        "[^.!?\\s]    # First char is non-punct, non-ws\n" +
                        "[^.!?]*      # Greedily consume up to punctuation.\n" +
                        "(?:          # Group for unrolling the loop.\n" +
                        "  [.!?]      # (special) inner punctuation ok if\n" +
                        "  (?!['\"]?\\s|$)  # not followed by ws or EOS.\n" +
                        "  [^.!?]*    # Greedily consume up to punctuation.\n" +
                        ")*           # Zero or more (special normal*)\n" +
                        "[.!?]?       # Optional ending punctuation.\n" +
                        "['\"]?       # Optional closing quote.\n" +
                        "(?=\\s|$)",
                Pattern.MULTILINE | Pattern.COMMENTS);

        Matcher reMatcher = pattern.matcher(text);
        while (reMatcher.find()) {
            sentences.add(new Sentence(reMatcher.group()));
        }