/**
  * Create a new tag
  *
  * @param string $instanceId instance id
  * @param string $word       tag word
  * @return TagEntity
  */
 protected function create($instanceId, $word)
 {
     $tag = new TagEntity();
     $tag->instanceId = $instanceId;
     $tag->word = $word;
     $tag->decomposed = $this->decomposer->execute($word);
     return $this->repo->insert($tag);
 }