seminar_topic

$meta_query = array(
	array(
		'key'     => 'seminar_topic',
		'value'   => '$seminar_topic[\\\'seminar_topic\\\'][\\\'value\\\']',
		'compare' => 'LIKE',
	),
	array(
		'key'     => 'seminar_programm',
		'value'   => 'Offenes_Seminar',
		'compare' => 'NOT LIKE',
	),
);