they shovel into their mental gullets to simulate sustenance 
(ROOT (S (NP (PRP they)) (VP (VBP shovel) (PP (IN into) (NP (PRP$ their) (JJ mental) (NNS gullets))) (S (VP (TO to) (VP (VB simulate) (NP (NN sustenance))))))))
(ROOT (S (NP (PRP )) (VP (VBP ) (PP (IN ) (NP (PRP$ ) (JJ ) (NNS ))) (S (VP (TO ) (VP (VB ) (NP (NN ))))))))