filter events

where category and

$tax_query = array(
	'relation' => 'AND',
	array(
		'taxonomy'         => 'events_categories',
		'terms'            => 'OK',
		'field'            => 'slug',
	),
	array(
		'taxonomy'         => 'faculties',
		'terms'            => 'OK2',
		'field'            => 'slug',
	),
);