( Solutions ( ( are ( ( special mixtures ) ( formed ( when ( ( one substance ) ( dissolves ( in another ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNPS Solutions)) (VP (VBP are) (NP (NP (JJ special) (NNS mixtures)) (VP (VBN formed) (SBAR (WHADVP (WRB when)) (S (NP (CD one) (NN substance)) (VP (VBZ dissolves) (PP (IN in) (NP (DT another))))))))) (. .)))
Solutions are special mixtures formed when one substance dissolves in another.
(ROOT (S (NP (DT A) (NN solution)) (VP (VBZ forms) (SBAR (WHADVP (WRB when)) (S (NP (CD one) (NN substance)) (VP (VBZ dissolves) (PP (IN into) (NP (DT another))))))) (. .)))
A solution forms when one substance dissolves into another.