crass , then gasp for gas , 
(ROOT (S (ADJP (JJ crass)) (, ,) (ADVP (RB then)) (VP (VB gasp) (PP (IN for) (NP (NN gas)))) (, ,)))
(ROOT (S (ADJP (JJ )) (, ) (ADVP (RB )) (VP (VB ) (PP (IN ) (NP (NN )))) (, )))