( ( ( This ( simple illustration ) ) ( of ( magnetic levitation ) ) ) ( ( shows ( that ( ( ( the force ) ( of gravity ) ) ( can ( be ( counterbalanced ( by ( magnetic force ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT This) (JJ simple) (NN illustration)) (PP (IN of) (NP (JJ magnetic) (NN levitation)))) (VP (VBZ shows) (SBAR (IN that) (S (NP (NP (DT the) (NN force)) (PP (IN of) (NP (NN gravity)))) (VP (MD can) (VP (VB be) (VP (VBN counterbalanced) (PP (IN by) (NP (JJ magnetic) (NN force))))))))) (. .)))
This simple illustration of magnetic levitation shows that the force of gravity can be counterbalanced by magnetic force.
(ROOT (S (NP (NNP Gravity) (CC and) (NNP magnetism)) (VP (VBP are) (NP (DT both) (JJ common) (NNS forces))) (. .)))
Gravity and magnetism are both common forces.