( ( For electricity ) ( , ( coal ( ( ( is ( by far ) ) ( the ( most-chosen ( fuel today ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN For) (NP (NN electricity))) (, ,) (NP (NN coal)) (VP (VBZ is) (ADVP (IN by) (RB far)) (NP (DT the) (JJ most-chosen) (NN fuel) (NN today))) (. .)))
For electricity, coal is by far the most-chosen fuel today.
(ROOT (S (NP (NNP Coal)) (VP (VBZ is) (NP (NP (DT the) (NN source)) (PP (IN of) (NP (JJS most) (NN electricity))))) (. .)))