( Thus ( , ( ( ( ( spiritualism , ) ( ( the belief ) ( in ( ( ( ( ( a ( special kind ) ) ( of force ) ) , ) and ) ( ( physicalism , ) ( ( the belief ) ( in ( ( magnetism and ) gravity ) ) ) ) ) ) ) ) , ) ( both ( ( received ( simultaneous support ) ) . ) ) ) ) )
(ROOT (S (ADVP (RB Thus)) (, ,) (NP (NP (NN spiritualism)) (, ,) (NP (NP (DT the) (NN belief)) (PP (IN in) (NP (NP (NP (DT a) (JJ special) (NN kind)) (PP (IN of) (NP (NN force)))) (, ,) (CC and) (NP (NP (NN physicalism)) (, ,) (NP (NP (DT the) (NN belief)) (PP (IN in) (NP (NN magnetism) (CC and) (NN gravity)))))))) (, ,)) (DT both) (VP (VBD received) (NP (JJ simultaneous) (NN support))) (. .)))
Thus, spiritualism, the belief in a special kind of force, and physicalism, the belief in magnetism and gravity, both received simultaneous support.
(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.