( Condensation ( ( is ( ( a ( chemical reaction ) ) ( ( in which ) ( ( two ( or ( more molecules ) ) ) ( ( join together ) ( to ( form ( a ( new substance ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Condensation)) (VP (VBZ is) (NP (NP (DT a) (JJ chemical) (NN reaction)) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (CD two) (CC or) (JJR more) (NNS molecules)) (VP (VBP join) (ADVP (RB together)) (S (VP (TO to) (VP (VB form) (NP (DT a) (JJ new) (NN substance)))))))))) (. .)))
Condensation is a chemical reaction in which two or more molecules join together to form a new substance.
(ROOT (S (NP (DT A) (NN combination) (NN reaction)) (VP (VBZ is) (NP (NP (DT a) (NN reaction)) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (CD two) (CC or) (JJR more) (NNS substances)) (VP (VBP combine) (S (VP (TO to) (VP (VB form) (NP (DT a) (JJ single) (JJ new) (NN substance)))))))))) (. .)))