( ( ( Base - ) ( ( A substance ) ( that ( ( ( gives ( a pH ) ) ( > 7 ) ) ( when ( added ( to water ) ) ) ) ) ) ) . )
(ROOT (NP (NP (NNP Base)) (: -) (NP (NP (DT A) (NN substance)) (SBAR (WHNP (WDT that)) (S (VP (VBZ gives) (NP (DT a) (NN pH)) (NP (CD >) (CD 7)) (SBAR (WHADVP (WRB when)) (S (VP (VBD added) (PP (TO to) (NP (NN water)))))))))) (. .)))
Base- A substance that gives a pH &gt; 7 when added to water.
(ROOT (S (SBAR (IN If) (S (NP (DT a) (NN substance)) (VP (VBZ has) (NP (DT a) (NN ph) (NN value)) (NP (QP (JJR greater) (IN than) (CD 7)))))) (, ,) (NP (DT that)) (VP (VBZ indicates) (SBAR (IN that) (S (NP (PRP it)) (VP (VBZ is) (NP (NN base)))))) (. .)))
If a substance has a ph value greater than 7,that indicates that it is base.