( Moreover ( , ( ( ( the type ) ( of ( oscillation ( that ( ( the mass ) executes ) ) ) ) ) ( ( is ( ( a ( special type ) ) ( of ( ( periodic motion ) ( called ( Simple ( Harmonic Motion ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB Moreover)) (, ,) (NP (NP (DT the) (NN type)) (PP (IN of) (NP (NP (NN oscillation)) (SBAR (IN that) (S (NP (DT the) (NN mass)) (VP (VBZ executes))))))) (VP (VBZ is) (NP (NP (DT a) (JJ special) (NN type)) (PP (IN of) (NP (NP (JJ periodic) (NN motion)) (VP (VBN called) (NP (NNP Simple) (NNP Harmonic) (NNP Motion))))))) (. .)))
Moreover, the type of oscillation that the mass executes is a special type of periodic motion called Simple Harmonic Motion .
(ROOT (S (NP (NP (DT An) (NN object)) (VP (VBN attached) (PP (TO to) (NP (NP (DT a) (NN spring)) (VP (VBG sliding) (PP (IN on) (NP (DT a) (JJ frictionless) (NN surface)))))))) (VP (VBZ is) (NP (NP (DT an) (JJ uncomplicated) (NN type)) (PP (IN of) (NP (ADJP (JJ simple) (JJ harmonic)) (NN oscillator))))) (. .)))
An object attached to a spring sliding on a frictionless surface is an uncomplicated type of simple harmonic oscillator.