The downloadable sentence sets can now be found under DATA.
Error message
Deprecated function: mb_convert_encoding(): Handling HTML entities via mbstring is deprecated; use htmlspecialchars, htmlentities, or mb_encode_numericentity/mb_decode_numericentity instead in Drupal\sb_data\Plugin\Filter\SbFilterInclude::replaceRelativeUrls() (line 86 of modules/custom/sb_data/src/Plugin/Filter/SbFilterInclude.php).