( ( A solution ) ( ( is ( ( ( a ( specific type ) ) ( of mixture ) ) ( where ( ( one substance ) ( is ( dissolved ( into another ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT A) (NN solution)) (VP (VBZ is) (NP (NP (DT a) (JJ specific) (NN type)) (PP (IN of) (NP (NN mixture))) (SBAR (WHADVP (WRB where)) (S (NP (CD one) (NN substance)) (VP (VBZ is) (VP (VBN dissolved) (PP (IN into) (NP (DT another))))))))) (. .)))
A solution is a specific type of mixture where one substance is dissolved into 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.