( This ( ( ( ( ( ( ( is ( known ( as ( the ( Rhesus factor ) ) ) ) ) , ) or ) ( more commonly ) ) , ) ( the ( Rh factor ) ) ) . ) )
(ROOT (S (NP (DT This)) (VP (VP (VBZ is) (VP (VBN known) (PP (IN as) (NP (DT the) (NNP Rhesus) (NN factor))))) (, ,) (CC or) (ADVP (RBR more) (RB commonly)) (, ,) (NP (DT the) (NNP Rh) (NN factor))) (. .)))
This is known as the Rhesus factor, or more commonly, the Rh factor.
(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))))))) (. .)))