( ( Try ( to ( ( tilt ( your ( ( shoulders and ) knees ) ) ) ( to ( ( the ( same angle ) ) ( as ( the slope ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB Try) (S (VP (TO to) (VP (VB tilt) (NP (PRP$ your) (NNS shoulders) (CC and) (NNS knees)) (PP (TO to) (NP (NP (DT the) (JJ same) (NN angle)) (PP (IN as) (NP (DT the) (NN slope))))))))) (. .)))
Try to tilt your shoulders and knees to the same angle as the slope.
(ROOT (S (NP (NP (NNP Instruments)) (SBAR (WHNP (WDT that)) (S (VP (VB measure) (NP (NP (DT the) (NN angle)) (PP (IN of) (NP (NP (DT the) (NN slope)) (PP (IN of) (NP (DT a) (NN volcano)))))))))) (VP (VBP are) (VP (VBN called) (NP (NN tilt) (NNS meters)))) (. .)))