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))))))) (. .)))
Commercial calculation was how he was able to explain his side.
( ( Commercial calculation ) ( ( was ( how ( he ( was ( able ( to ( explain ( his side ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Commercial) (NN calculation)) (VP (VBD was) (SBAR (WHADVP (WRB how)) (S (NP (PRP he)) (VP (VBD was) (ADJP (JJ able) (S (VP (TO to) (VP (VB explain) (NP (PRP$ his) (NN side)))))))))) (. .)))