public function queryAllPhobias()
    {
        $sparql = '
            PREFIX dbo: <http://dbpedia.org/ontology/>
            PREFIX foaf: <http://xmlns.com/foaf/0.1/>

            SELECT * WHERE  {
                ?phobia rdfs:label ?label .
                ?phobia dbo:abstract ?info .
                ?phobia foaf:isPrimaryTopicOf ?link .
            }';
        $result = $this->stardogService->executeStatement($sparql, StardogService::EXECUTE_QUERY);
        return $result;
    }
    /**
     * @param $phobia
     * @return array
     */
    public function findSymptomsForPhobia($phobia)
    {
        $sparql = '
            PREFIX remedies: <http://phobia.vrinceanu.com/remedies#>

            SELECT ?symptomName
            WHERE {
                ?r remedies:appearsFor "' . $phobia . '" .
                ?r remedies:symptomName ?symptomName .
            }';
        $sparqlResult = $this->stardogService->executeStatement($sparql, StardogService::EXECUTE_QUERY);
        $symptomArr = $this->processSymptomJsonString($sparqlResult);
        return $symptomArr;
    }
 /**
  * @param $email
  * @return mixed
  */
 public function getPersonsForUser($email)
 {
     $sparql = '
         PREFIX foaf:  <http://xmlns.com/foaf/0.1/>
         SELECT *
         WHERE {
             ?r foaf:name ?name .
             ?r foaf:nickname ?nickname .
             ?r foaf:knows <http://phobia.vrinceanu.com/user#' . $email . '> .
         }';
     $result = $this->stardogService->executeStatement($sparql, StardogService::EXECUTE_QUERY);
     $personsArr = $this->processPersonJsonString($result);
     foreach ($personsArr as $key => $person) {
         $phobias = $this->findPhobiasForUser($person['nickname'], 'foaf:nickname');
         $personsArr[$key]['phobias'] = $phobias;
     }
     return $personsArr;
 }