protected function basicFetchQuery($context, array $args)
    {
        if ($context !== 'person') {
            throw new \LogicException('TimelineAccompanyingPeriod is not able '
                    . 'to render context '.$context);
        }
        
        $metadata = $this->em
                ->getClassMetadata('ChillPersonBundle:AccompanyingPeriod')
                ;
        
        return array(
            'id' => $metadata->getColumnName('id'),
            'date' => $metadata->getColumnName('openingDate'),
            'FROM' => $metadata->getTableName(),
        );
    }