Still, commercial calculation isn't sufficient to explain his stand.
( Still ( , ( ( commercial calculation ) ( ( ( is n't ) ( sufficient ( to ( explain ( his stand ) ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB Still)) (, ,) (NP (JJ commercial) (NN calculation)) (VP (VBZ is) (RB n't) (ADJP (JJ sufficient) (S (VP (TO to) (VP (VB explain) (NP (PRP$ his) (NN stand))))))) (. .)))
Nothing will be enough to explain his strong opinion.
( Nothing ( ( will ( be ( enough ( to ( explain ( his ( strong opinion ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NN Nothing)) (VP (MD will) (VP (VB be) (ADJP (JJ enough) (S (VP (TO to) (VP (VB explain) (NP (PRP$ his) (JJ strong) (NN opinion)))))))) (. .)))