( ( A domain ) ( ( is ( ( ( the ( highest taxon ) ) , ) ( just ( above ( the kingdom ) ) ) ) ) . ) )
(ROOT (S (NP (DT A) (NN domain)) (VP (VBZ is) (NP (NP (DT the) (JJS highest) (NN taxon)) (, ,) (RRC (ADVP (RB just)) (PP (IN above) (NP (DT the) (NN kingdom)))))) (. .)))
A domain is the highest taxon, just above the kingdom.
(ROOT (S (NP (DT A) (NN domain)) (VP (VBZ is) (NP (NP (DT the) (JJS highest) (NN taxon)) (PP (IN in) (NP (NP (DT the) (NN classification)) (PP (IN of) (NP (VBG living) (NNS things))))))) (. .)))