( ( Wind ( Energy ( Wind energy ) ) ) ( ( is ( ( a form ) ( of ( ( solar energy ) ( produced ( by ( ( uneven heating ) ( of ( ( the ( Earth 's ) ) surface ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (CD Wind) (NNP Energy) (NN Wind) (NN energy)) (VP (VBZ is) (NP (NP (DT a) (NN form)) (PP (IN of) (NP (NP (JJ solar) (NN energy)) (VP (VBN produced) (PP (IN by) (NP (NP (JJ uneven) (NN heating)) (PP (IN of) (NP (NP (DT the) (NN Earth) (POS 's)) (NN surface)))))))))) (. .)))
Wind Energy Wind energy is a form of solar energy produced by uneven heating of the Earth's surface.
(ROOT (S (NP (NNP Heat)) (VP (VBZ is) (VP (VBN produced) (SBAR (WHADVP (WRB when)) (S (NP (NN paper)) (VP (VBZ is) (VP (VBN burned))))))) (. .)))
Heat is produced when paper is burned.