sentence1_binary_parse: ( pH ( ( is ( ( a measure ) ( of ( ( the concentration ) ( of ( ( hydrogen ions ) ( in ( a solution ) ) ) ) ) ) ) ) . ) )
sentence1_parse: (ROOT (S (NP (NN pH)) (VP (VBZ is) (NP (NP (DT a) (NN measure)) (PP (IN of) (NP (NP (DT the) (NN concentration)) (PP (IN of) (NP (NP (NN hydrogen) (NNS ions)) (PP (IN in) (NP (DT a) (NN solution))))))))) (. .)))
sentence1: pH is a measure of the concentration of hydrogen ions in a solution.
sentence2_parse: (ROOT (S (NP (NP (DT The) (NN concentration)) (PP (IN of) (NP (NP (DT the) (NN hydrogen) (NN ion)) (PP (IN in) (NP (DT a) (NN solution)))))) (VP (MD can) (VP (VB be) (VP (VBN calculated) (SBAR (WHADVP (WRB when)) (S (NP (DT the) (NN ph)) (VP (VBZ is) (VP (VBN known)))))))) (. .)))
sentence2: The concentration of the hydrogen ion in a solution can be calculated when the ph is known.