( ( Another type ) ( ( is ( ( connatal PMD ) ( which ( ( ( ( ( ( begins ( ( ( at birth ) or ) ( in infancy ) ) ) , ) ( ( leads ( to death ) ) ( in ( ( the ( first decade ) ) ( of life ) ) ) ) ) , ) and ) ( involves ( complete demyelination ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT Another) (NN type)) (VP (VBZ is) (NP (NP (NNP connatal) (NNP PMD)) (SBAR (WHNP (WDT which)) (S (VP (VP (VBZ begins) (PP (PP (IN at) (NP (NN birth))) (CC or) (PP (IN in) (NP (NN infancy))))) (, ,) (VP (VBZ leads) (PP (TO to) (NP (NN death))) (PP (IN in) (NP (NP (DT the) (JJ first) (NN decade)) (PP (IN of) (NP (NN life)))))) (, ,) (CC and) (VP (VBZ involves) (NP (JJ complete) (NN demyelination)))))))) (. .)))
Another type is connatal PMD which begins at birth or in infancy, leads to death in the first decade of life, and involves complete demyelination.
(ROOT (S (NP (NNP Infancy)) (VP (VBZ is) (NP (NP (DT the) (JJ first) (NN year)) (PP (IN of) (NP (NP (NN life)) (PP (VBG following) (NP (NN birth))))))) (. .)))