( ( Maintain ( a ( healthy diet ) ) ) . )
(ROOT (S (VP (VB Maintain) (NP (DT a) (JJ healthy) (NN diet))) (. .)))
Maintain a healthy diet.
(ROOT (S (NP (DT A) (JJ healthy) (NN diet)) (VP (VBZ is) (NP (NP (DT the) (JJS best) (NN way)) (SBAR (S (VP (TO to) (VP (VB maintain) (NP (DT a) (ADJP (JJ strong) (, ,) (JJ fit)) (NN body)))))))) (. .)))