( ( ( ( ( And ( then ( they ( take ( that ( ( ( ash and ) water ) ( wash ( ( it , ) ( which ( gets ( rid ( of ( ( ( the ( alkali salts ) ) , ) ( the ( alkaline metals ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) , ) and ) ( ( these plants ) ( just ( happen ( to ( be ( very ( high ( in iridium ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (CC And) (ADVP (RB then)) (NP (PRP they)) (VP (VBP take) (SBAR (IN that) (S (NP (NN ash) (CC and) (NN water)) (VP (VBP wash) (NP (NP (PRP it)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ gets) (ADJP (JJ rid) (PP (IN of) (NP (NP (DT the) (JJ alkali) (NNS salts)) (, ,) (NP (DT the) (JJ alkaline) (NNS metals)))))))))))))) (, ,) (CC and) (S (NP (DT these) (NNS plants)) (ADVP (RB just)) (VP (VBP happen) (S (VP (TO to) (VP (VB be) (ADJP (RB very) (JJ high) (PP (IN in) (NP (NN iridium))))))))) (. .)))
And then they take that ash and water wash it, which gets rid of the alkali salts, the alkaline metals, and these plants just happen to be very high in iridium.
(ROOT (S (NP (DT The) (NN word) (NN alkali)) (VP (VBZ comes) (PP (IN from) (NP (DT the) (JJ arabic) (NN al-qili))) (, ,) (S (VP (VBG meaning) (`` ``) (NP (NP (NNS ashes)) (PP (IN of) (NP (NP (DT the) (JJ saltwort) (NN plant)) (PP (IN from) (NP (NN salt) (NNS marshes)))))) ('' '')))) (. .)))