is generally amusing from time to time 
(ROOT (VP (VBZ is) (ADVP (RB generally)) (ADJP (JJ amusing)) (PP (PP (IN from) (NP (NN time))) (PP (IN to) (NP (NN time))))))
(ROOT (VP (VBZ ) (ADVP (RB )) (ADJP (JJ )) (PP (PP (IN ) (NP (NN ))) (PP (IN ) (NP (NN ))))))