( ( Some ( ( commonly used ) ( fossil fuels ) ) ) ( ( are ( ( ( ( ( ( diesel ( , ( coal ( , ( wood ( , ( kerosene ( , ( propane ( , ( natural gas ) ) ) ) ) ) ) ) ) ) ) , ) gasoline ) , ) and ) ( charcoal briquettes ) ) ) . ) )
(ROOT (S (NP (DT Some) (ADJP (RB commonly) (VBN used)) (JJ fossil) (NNS fuels)) (VP (VBP are) (NP (NP (JJ diesel) (, ,) (NN coal) (, ,) (NN wood) (, ,) (NN kerosene) (, ,) (NN propane) (, ,) (JJ natural) (NN gas)) (, ,) (NP (NN gasoline)) (, ,) (CC and) (NP (NN charcoal) (NNS briquettes)))) (. .)))
Some commonly used fossil fuels are diesel, coal, wood, kerosene, propane, natural gas, gasoline, and charcoal briquettes.
(ROOT (S (PP (RB Instead) (IN of) (NP (NN wood))) (, ,) (NP (DT some) (NNS fireplaces)) (VP (VBP use) (NP (NN propane))) (. .)))