( ( ( The keys ) ( to ( a ( healthy life ) ) ) ) ( ( are ( ( ( regular exercise ) and ) ( ( good nutritional ) habits ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NNS keys)) (PP (TO to) (NP (DT a) (JJ healthy) (NN life)))) (VP (VBP are) (NP (NP (JJ regular) (NN exercise)) (CC and) (NP (ADJP (JJ good) (JJ nutritional)) (NNS habits)))) (. .)))
The keys to a healthy life are regular exercise and good nutritional habits.
(ROOT (S (NP (NNP Exercising)) (ADVP (RB regularly)) (VP (VBZ is) (NP (DT a) (JJ good) (NN health) (NN habit))) (. .)))
Exercising regularly is a good health habit.