static function batch_add($exhibit_id, $address_field, $datum_ids, $addresses)
 {
     /*
      * Delete everything that isn't one of datum_ids and is associated with exhibit_id,address_field
      */
     $table = WpExhibitConfig::table_name(WpExhibitConfig::$GEOCODE_TABLE_KEY);
     global $wpdb;
     // Prepare the list of things they're asking about
     $list_of_ids = array();
     for ($i = 0; $i < count($datum_ids); $i++) {
         $list_of_ids[$i] = $wpdb->prepare("%s", $datum_ids[$i]);
     }
     $theList = join(", ", $list_of_ids);
     $sql = "DELETE FROM {$table} WHERE exhibit_id = %d AND addressField = %s AND datum_id NOT IN ({$theList});";
     $query = $wpdb->prepare($sql, $exhibit_id, $address_field);
     $row = $wpdb->query($query);
     if (count($datum_ids) == count($addresses)) {
         for ($i = 0; $i < count($datum_ids); $i++) {
             WpExhibitGeocoder::lookup($exhibit_id, $address_field, $datum_ids[$i], $addresses[$i]);
         }
         return true;
     } else {
         return false;
     }
 }