( ( ( ( Knows ( that day ) ) and ) night ) ( ( are ( caused ( by ( ( ( Earth 's ) rotation ) ( on ( its axis ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NP (NNS Knows)) (NP (DT that) (NN day))) (CC and) (NP (NN night))) (VP (VBP are) (VP (VBN caused) (PP (IN by) (NP (NP (NP (NNP Earth) (POS 's)) (NN rotation)) (PP (IN on) (NP (PRP$ its) (NNS axis))))))) (. .)))
Knows that day and night are caused by Earth's rotation on its axis.
(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)))))) (. .)))