( Who ( ( knows ( but ( there ( is ( ( ( a lot ) ( of ( ( power and ) energy ) ) ) ( in this ) ) ) ) ) ) . ) )
(ROOT (SBARQ (WHNP (WP Who)) (SQ (VP (VBZ knows) (SBAR (CC but) (S (NP (EX there)) (VP (VBZ is) (NP (NP (DT a) (NN lot)) (PP (IN of) (NP (NN power) (CC and) (NN energy))) (PP (IN in) (NP (DT this))))))))) (. .)))
Who knows but there is a lot of power and energy in this.
(ROOT (S (NP (NP (DT The) (NN rate)) (SBAR (IN that) (S (NP (NN energy)) (VP (VBZ is) (VP (VBN released)))))) (VP (VBZ is) (VP (VBN known) (PP (IN as) (NP (NN power))))) (. .)))