( ( ( The ( Rh factor ) ) ( -LRB- ( ( Rh ( meaning Rhesus ) ) -RRB- ) ) ) ( ( is ( ( a feature ) ( of ( ( the ( second ( ( most common ) ( blood-group system ) ) ) ) ( in ( human-blood transfusion ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NNP Rh) (NN factor)) (PRN (-LRB- -LRB-) (NP (NN Rh) (NN meaning) (NNS Rhesus)) (-RRB- -RRB-))) (VP (VBZ is) (NP (NP (DT a) (NN feature)) (PP (IN of) (NP (NP (DT the) (JJ second) (ADJP (RBS most) (JJ common)) (NN blood-group) (NN system)) (PP (IN in) (NP (JJ human-blood) (NN transfusion))))))) (. .)))
The Rh factor (Rh meaning Rhesus) is a feature of the second most common blood-group system in human-blood transfusion.
(ROOT (S (NP (NNP Rh)) (VP (VBZ is) (NP (NP (DT the) (JJ common) (NN abbreviation)) (PP (IN for) (S (VP (VBG noting) (NP (DT the) (JJ rhesus) (NN blood) (NN type))))))) (. .)))