( ( ( Kilauea ( Caldera ( Kilauea ( Iki ( Thurston ( Lava ( Tube ( Mauna ( Ulu ( Pu'u ( Huluhulu Pumice ) ) ) ) ) ) ) ) ) ) ) ( When ( ( lava ( with ( lots ( of ( ( gas bubbles ) ( in it ) ) ) ) ) ) ( gets ( ( ( thrown ( into ( the air ) ) ) , ) pumice ) ) ) ) ) ( ( is formed ) . ) )
(ROOT (S (NP (NP (NNP Kilauea) (NNP Caldera) (NNP Kilauea) (NNP Iki) (NNP Thurston) (NNP Lava) (NNP Tube) (NNP Mauna) (NNP Ulu) (NNP Pu'u) (NNP Huluhulu) (NNP Pumice)) (SBAR (WHADVP (WRB When)) (S (NP (NP (NN lava)) (PP (IN with) (NP (NP (NNS lots)) (PP (IN of) (NP (NP (NN gas) (NNS bubbles)) (PP (IN in) (NP (PRP it)))))))) (VP (VBZ gets) (S (VP (VBN thrown) (PP (IN into) (NP (DT the) (NN air))) (, ,) (ADVP (RB pumice)))))))) (VP (VBZ is) (VP (VBN formed))) (. .)))
Kilauea Caldera Kilauea Iki Thurston Lava Tube Mauna Ulu Pu'u Huluhulu Pumice When lava with lots of gas bubbles in it gets thrown into the air, pumice is formed.
(ROOT (S (NP (NNP Gas) (NN bubble) (NNS holes)) (VP (VBZ helps) (NP (NP (JJ pumice) (NN float)) (PP (IN in) (NP (NN water))))) (. .)))