public function prepareDB()
{
$this->getConnection()->sendCypherQuery('MATCH (n) OPTIONAL MATCH (n)-[r]-() DELETE r,n');
$prepare = 'CREATE (c:Campaign)-[:CREATED_FOR]->(f:FacebookPage), (c)-[:HAPPENS_AT]->(l:Location)';
$this->getConnection()->sendCypherQuery($prepare);
$p2 = 'CREATE (c:Campaign)-[:CREATED_FOR]->(f:FacebookPage), (c)-[:HAPPENS_AT]->(l:Location), (fa:FacebookAlbum)-[:OPENED_FOR]->(c)';
$this->getConnection()->sendCypherQuery($p2);
}