( ( ( Lava flows ) ( produced ( by ( eruptions ( under water ) ) ) ) ) ( ( are ( called ( pillow lavas ) ) ) . ) )
(ROOT (S (NP (NP (NNP Lava) (NNS flows)) (VP (VBN produced) (PP (IN by) (NP (NP (NNS eruptions)) (PP (IN under) (NP (NN water))))))) (VP (VBP are) (VP (VBN called) (NP (NN pillow) (NNS lavas)))) (. .)))
Lava flows produced by eruptions under water are called pillow lavas .
(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)))) (. .)))