( ( ( Partially decayed ) ( organic material ) ) ( ( ( ( is ( called humus ) ) and ) ( has ( a ( dark ( ( brown ( , ( almost ( black , ) ) ) ) color ) ) ) ) ) . ) )
(ROOT (S (NP (ADJP (RB Partially) (JJ decayed)) (JJ organic) (NN material)) (VP (VP (VBZ is) (VP (VBN called) (NP (NNS humus)))) (CC and) (VP (VBZ has) (NP (DT a) (JJ dark) (ADJP (JJ brown) (, ,) (RB almost) (JJ black) (, ,)) (NN color)))) (. .)))
Partially decayed organic material is called humus and has a dark brown, almost black, color.
(ROOT (S (NP (NP (DT The) (JJ decayed) (NNS remains)) (PP (IN of) (NP (VBG living) (NNS organisms)))) (VP (VBZ is) (VP (VBN called) (NP (NNS humus)))) (. .)))