any of the signposts , as if 
(ROOT (NP (NP (NP (DT any)) (PP (IN of) (NP (DT the) (NNS signposts)))) (, ,) (SBAR (IN as) (IN if))))
(ROOT (NP (NP (NP (DT )) (PP (IN ) (NP (DT ) (NNS )))) (, ) (SBAR (IN ) (IN ))))