( ( ( ( ( scuba -LRB- ) ( self-contained ( underwater ( breathing apparatus ) ) ) ) -RRB- ) ( ( The use ) ( of ( tanks ( of ( ( compressed air ) ( for ( breathing underwater ) ) ) ) ) ) ) ) . )
(ROOT (NP (NP (NP (NN scuba)) (-LRB- -LRB-) (NP (JJ self-contained) (JJ underwater) (NN breathing) (NN apparatus)) (-RRB- -RRB-)) (NP (NP (DT The) (NN use)) (PP (IN of) (NP (NP (NNS tanks)) (PP (IN of) (NP (NP (JJ compressed) (NN air)) (PP (IN for) (S (VP (VBG breathing) (NP (JJ underwater)))))))))) (. .)))
scuba (self-contained underwater breathing apparatus) The use of tanks of compressed air for breathing underwater.
(ROOT (S (NP (DT An) (JJ underwater) (NN spider)) (VP (VBZ uses) (NP (JJ shiny) (NN air) (NN bubble) (S (VP (TO to) (VP (VP (VB breathe)) (CC and) (VP (VB keep) (ADJP (JJ alive)))))))) (. .)))