wp tax query
//simple 'tax_query' => array( array( 'taxonomy' => 'people', 'field' => 'slug', 'terms' => 'bob', ), ), //more complicated 'tax_query' => array( 'relation' => 'OR', array( 'taxonomy' => 'category', 'field' => 'slug', 'terms' => array( 'quotes' ), ), array( 'relation' => 'AND', array( 'taxonomy' => 'post_format', 'field' => 'slug', 'terms' => array( 'post-format-quote' ), ), array( 'taxonomy' => 'category', 'field' => 'slug', 'terms' => array( 'wisdom' ), ), ), ),