( Basically ( , ( ( ( ( ( this system ) ( encompasses ( ( several types ) ( of ( white ( blood cells ) ) ) ) ) ) and ) ( ( a ( blood protein ) ) ( called complement ) ) ) . ) ) )
(ROOT (S (ADVP (RB Basically)) (, ,) (S (NP (DT this) (NN system)) (VP (VBZ encompasses) (NP (NP (JJ several) (NNS types)) (PP (IN of) (NP (JJ white) (NN blood) (NNS cells)))))) (CC and) (S (NP (DT a) (NN blood) (NN protein)) (VP (VBD called) (VP (VB complement)))) (. .)))
Basically, this system encompasses several types of white blood cells and a blood protein called complement.
(ROOT (S (NP (DT The) (JJ complement) (NN system)) (VP (VBZ is) (NP (NP (DT a) (NN series)) (PP (IN of) (NP (NP (NNS proteins)) (VP (ADVP (RB constitutively)) (VBN found) (PP (IN in) (NP (DT the) (NN blood) (NN plasma)))))))) (. .)))