pass for a litmus test of the generation gap and not bad enough to repulse any generation of its fans 
(ROOT (S (VP (VB pass) (PP (IN for) (NP (NP (DT a) (JJ litmus) (NN test)) (PP (IN of) (NP (DT the) (NN generation) (NN gap)))))) (CC and) (ADJP (RB not) (JJ bad) (RB enough) (S (VP (TO to) (VP (VB repulse) (NP (NP (DT any) (NN generation)) (PP (IN of) (NP (PRP$ its) (NNS fans))))))))))
(ROOT (S (VP (VB ) (PP (IN ) (NP (NP (DT ) (JJ ) (NN )) (PP (IN ) (NP (DT ) (NN ) (NN )))))) (CC ) (ADJP (RB ) (JJ ) (RB ) (S (VP (TO ) (VP (VB ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (PRP$ ) (NNS ))))))))))