( Identify ( ( work ( tasks ( that ( involve ( ( ( ( ( ( ( ( ( forceful exertions ) , ) ( awkward postures ) ) , ) ( repetitive motions ) ) , ) ( prolonged postures ) ) and ) exertions ) ) ) ) ) . ) )
(ROOT (S (ADVP (RB Identify)) (VP (VB work) (NP (NP (NNS tasks)) (SBAR (WHNP (WDT that)) (S (VP (VBP involve) (NP (NP (JJ forceful) (NNS exertions)) (, ,) (NP (JJ awkward) (NNS postures)) (, ,) (NP (JJ repetitive) (NNS motions)) (, ,) (NP (JJ prolonged) (NNS postures)) (CC and) (NP (NNS exertions)))))))) (. .)))
Identify work tasks that involve forceful exertions, awkward postures, repetitive motions, prolonged postures and exertions.
(ROOT (S (NP (NNP Work)) (VP (VBZ is) (VP (VBN done) (SBAR (RB only) (IN if) (S (NP (DT a) (NN force)) (VP (VBZ is) (VP (VBN exerted) (PP (IN in) (NP (NP (DT the) (NN direction)) (PP (IN of) (NP (NN motion))))))))))) (. .)))