test
$tax_query = array( 'relation' => 'AND', array( 'taxonomy' => 'content_type', 'terms' => 'events', 'field' => 'term_id', ), array( 'taxonomy' => 'category', 'terms' => 'children-youth-signs-and-symptoms', 'field' => 'term_id', 'include_children' => true, ), );