Credibility is a vital factor, and Jim Lehrer does, indeed, have it.
( ( ( ( ( Credibility ( is ( a ( vital factor ) ) ) ) , ) and ) ( ( Jim Lehrer ) ( ( ( ( does , ) indeed ) , ) ( have it ) ) ) ) . )
(ROOT (S (S (NP (NN Credibility)) (VP (VBZ is) (NP (DT a) (JJ vital) (NN factor)))) (, ,) (CC and) (S (NP (NNP Jim) (NNP Lehrer)) (VP (VBZ does) (, ,) (ADVP (RB indeed)) (, ,) (S (VP (VB have) (NP (PRP it)))))) (. .)))
Jim Lehrer has a lot of credibility, which is good for him.
( ( Jim Lehrer ) ( ( has ( ( a lot ) ( of ( ( credibility , ) ( which ( is ( good ( for him ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Jim) (NNP Lehrer)) (VP (VBZ has) (NP (NP (DT a) (NN lot)) (PP (IN of) (NP (NP (NN credibility)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (ADJP (JJ good) (PP (IN for) (NP (PRP him))))))))))) (. .)))