( ( ( ( The evolution ) ( of ( the tiltmeter ) ) ) ( at ( the ( Hawaiian ( Volcano ( Observatory ( Tilt ( measurement instruments ) ) ) ) ) ) ) ) . )
(ROOT (NP (NP (DT The) (NN evolution)) (PP (IN of) (NP (DT the) (NN tiltmeter))) (PP (IN at) (NP (DT the) (JJ Hawaiian) (NNP Volcano) (NNP Observatory) (NNP Tilt) (NN measurement) (NNS instruments))) (. .)))
The evolution of the tiltmeter at the Hawaiian Volcano Observatory Tilt measurement instruments.
(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)))) (. .)))