( ( ( Day and ) night ) ( ( are ( ( caused ( by ( the ( spinning ( -LRB- ( rotation -RRB- ) ) ) ) ) ) ( of ( the earth ) ) ) ) . ) )
(ROOT (S (NP (NN Day) (CC and) (NN night)) (VP (VBP are) (VP (VBN caused) (PP (IN by) (NP (DT the) (JJ spinning) (-LRB- -LRB-) (NN rotation) (-RRB- -RRB-))) (PP (IN of) (NP (DT the) (NN earth))))) (. .)))
Day and night are caused by the spinning (rotation) of the earth.
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (QP (JJR fewer) (IN than) (CD 24)) (NNS hours)) (PP (IN of) (NP (NP (NN daylight)) (PP (IN in) (NP (NN alaska)))))) (PP (IN during) (NP (NP (DT each) (NN day)) (PP (IN in) (NP (NNP april))))) (SBAR (IN because) (S (NP (NP (NN earth) (POS 's)) (NN rotation)) (VP (VBZ causes) (NP (DT both) (NN day) (CC and) (NN night)))))) (. .)))