( ( Each experiment ) ( ( ( involved ( ( a ( desalination process ) ) ( of ( lengthy ( and ( repeated immersion ) ) ) ) ) ) ( in water ) ) . ) )
(ROOT (S (NP (DT Each) (NN experiment)) (VP (VBD involved) (NP (NP (DT a) (NN desalination) (NN process)) (PP (IN of) (NP (JJ lengthy) (CC and) (JJ repeated) (NN immersion)))) (PP (IN in) (NP (NN water)))) (. .)))
Each experiment involved a desalination process of lengthy and repeated immersion in water.
(ROOT (S (NP (NP (NNP Process)) (PP (IN of) (NP (NN desalinization)))) (VP (VBZ helps) (VP (VB provide) (NP (JJR cleaner) (NN water)) (PP (IN for) (NP (NN agriculture))))) (. .)))