( ( Eruptions ( under ( ( water or ) ice ) ) ) ( ( produce ( pillow lava ) ) . ) )
(ROOT (S (NP (NP (NNS Eruptions)) (PP (IN under) (NP (NN water) (CC or) (NN ice)))) (VP (VBP produce) (NP (NN pillow) (NN lava))) (. .)))
Eruptions under water or ice produce pillow lava.
(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)))) (. .)))