/**
* Stem a singular word to its common stem form.
*
* @param string $word the word to stem, e.g : mengalahkan
* @return string common stem form, e.g : kalah
*/
protected function stemSingularWord($word)
{
$context = new Context($word, $this->dictionary, $this->visitorProvider);
$context->execute();
return $context->getResult();
}