( ( This ( under ( water lava ) ) ) ( ( is ( called ( ( pillow lava ) ( because ( of ( its shape ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT This)) (PP (IN under) (NP (NN water) (NN lava)))) (VP (VBZ is) (VP (VBN called) (NP (NP (NN pillow) (NN lava)) (PP (RB because) (IN of) (NP (PRP$ its) (NN shape)))))) (. .)))
This under water lava is called pillow lava because of its shape.
(ROOT (S (NP (NP (NNP Lava)) (SBAR (WHNP (WDT that)) (S (VP (VBZ enters) (NP (DT the) (NN water)))))) (VP (VBZ is) (VP (VBN called) (NP (NN pillow) (NN lava)))) (. .)))