( ( The ( main purpose ) ) ( ( was ( to ( help ( ( the ( service men ) ) ( ( ( learn ( new traits ) ) and ) ( make ( them ( able ( to ( ( provide food ) ( for themselves ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ main) (NN purpose)) (VP (VBD was) (S (VP (TO to) (VP (VB help) (S (NP (DT the) (NN service) (NNS men)) (VP (VP (VB learn) (NP (JJ new) (NNS traits))) (CC and) (VP (VB make) (S (NP (PRP them)) (ADJP (JJ able) (S (VP (TO to) (VP (VB provide) (NP (NN food)) (PP (IN for) (NP (PRP themselves))))))))))))))) (. .)))
The main purpose was to help the service men learn new traits and make them able to provide food for themselves.
(ROOT (S (S (VP (VBG Being) (ADJP (JJ able) (S (VP (TO to) (VP (VB read))))))) (VP (VBZ is) (NP (NP (DT an) (NN example)) (PP (IN of) (NP (DT a) (JJ learned) (NN trait))))) (. .)))