( ( This inflation ) ( ( is ( measured ( as ( ( a ( tiny change ) ) ( in ( ( the slope ) ( of ( ( ( the ground ) , ) ( which ( is ( ( recorded ( by ( HVO tiltmeters ) ) ) ( at ( ( Kilauea 's ) summit ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT This) (NN inflation)) (VP (VBZ is) (VP (VBN measured) (PP (IN as) (NP (NP (DT a) (JJ tiny) (NN change)) (PP (IN in) (NP (NP (DT the) (NN slope)) (PP (IN of) (NP (NP (DT the) (NN ground)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (VP (VBN recorded) (PP (IN by) (NP (NNP HVO) (NNS tiltmeters))) (PP (IN at) (NP (NP (NNP Kilauea) (POS 's)) (NN summit))))))))))))))) (. .)))
This inflation is measured as a tiny change in the slope of the ground, which is recorded by HVO tiltmeters at Kilauea's summit.
(ROOT (S (NP (NNS Tiltmeters)) (VP (VBP are) (VP (VBN used) (S (VP (TO to) (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))))))))))) (. .)))