as in aimless , arduous , and arbitrary . 
(ROOT (PP (IN as) (PP (IN in) (ADJP (JJ aimless) (, ,) (JJ arduous) (, ,) (CC and) (JJ arbitrary))) (. .)))
(ROOT (PP (IN ) (PP (IN ) (ADJP (JJ ) (, ) (JJ ) (, ) (CC ) (JJ ))) (. )))