( ( ( ( 1959 Eruptions ) ( at ( Kilauea Iki ) ) ) ( ( , ( ( ( cinder cone ) formed ) , ) ) ( ( ( filled crater ) ( with ( ( a ( lava lake ) ) ( 1969-1974 Eruptions ) ) ) ) ( at ( the ( East ( Rift Zone ) ) ) ) ) ) ) ( , ( ( Mauna Ulu ) ( built . ) ) ) )
(ROOT (S (S (NP (NP (CD 1959) (NNS Eruptions)) (PP (IN at) (NP (NNP Kilauea) (NNP Iki)))) (PRN (, ,) (S (NP (NN cinder) (NN cone)) (VP (VBD formed))) (, ,)) (VP (VBN filled) (NP (NN crater)) (PP (IN with) (NP (NP (DT a) (NN lava) (NN lake)) (NP (CD 1969-1974) (NNS Eruptions)))) (PP (IN at) (NP (DT the) (NNP East) (NNP Rift) (NNP Zone))))) (, ,) (NP (NNP Mauna) (NNP Ulu)) (VP (VBD built)) (. .)))
1959 Eruptions at Kilauea Iki, cinder cone formed, filled crater with a lava lake 1969-1974 Eruptions at the East Rift Zone, Mauna Ulu built.
(ROOT (S (NP (NNS Craters) (CC and) (NNS rifts)) (VP (VBP become) (NP (NNS lakes)) (SBAR (WHADVP (WRB when)) (S (NP (PRP they)) (VP (VBP fill) (PP (IN with) (NP (NN water))))))) (. .)))