( ( ( ( ( P ( Angle meter ) ) , ) ( ( an instrument ) ( for ( measuring angles ) ) ) ) , ) ( esp . ) )
(ROOT (S (NP (NP (NNP P) (NNP Angle) (NNP meter)) (, ,) (NP (NP (DT an) (NN instrument)) (PP (IN for) (NP (NN measuring) (NNS angles)))) (, ,)) (VP (VBP esp)) (. .)))
P Angle meter, an instrument for measuring angles, esp.
(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)))) (. .)))