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Multiple taxonomies

$tax_query = array(
	array(
		'taxonomy'         => 'level',
		'terms'            => 'k-8',
		'field'            => 'slug',
	),
	array(
		'taxonomy'         => 'season',
		'terms'            => 'season-one',
		'field'            => 'slug',
	),
	array(
		'taxonomy'         => 'level',
		'terms'            => 'vacation-week',
		'field'            => 'slug',
		'operator'         => 'NOT IN',
		'include_children' => true,
	),
);