( ( ( A base ) ( that ( ( dissolves ( in water ) ) ( to ( give ( hydroxide ions ) ) ) ) ) ) ( ( is ( called ( an alkali ) ) ) . ) )
(ROOT (S (NP (NP (DT A) (NN base)) (SBAR (WHNP (WDT that)) (S (VP (VBZ dissolves) (PP (IN in) (NP (NN water))) (S (VP (TO to) (VP (VB give) (NP (JJ hydroxide) (NNS ions))))))))) (VP (VBZ is) (VP (VBN called) (NP (DT an) (NN alkali)))) (. .)))
A base that dissolves in water to give hydroxide ions is called an alkali .
(ROOT (S (NP (DT A) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (NN base)) (VP (VBZ is) (NP (NP (DT an) (JJ ionic) (NN compound)) (SBAR (WHNP (WDT that)) (S (VP (VBZ produces) (NP (JJ negative) (NN hydroxide) (NNS ions)) (SBAR (WHADVP (WRB when)) (S (VP (VBN dissolved) (PP (IN in) (NP (NN water)))))))))))))