'  Perhaps it was so called because it opens in morning and closes at night, or because of its eyelike shape.
( ' ( ( Perhaps it ) ( ( ( was so ) ( called ( because ( it ( ( ( opens ( in morning ) ) and ) ( closes ( ( ( ( ( at night ) , ) or ) because ) ( of ( its ( eyelike shape ) ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S ('' ') (NP (RB Perhaps) (PRP it)) (VP (VBD was) (ADVP (RB so)) (VP (VBN called) (SBAR (IN because) (S (NP (PRP it)) (VP (VP (VBZ opens) (PP (IN in) (NP (NN morning)))) (CC and) (VP (VBZ closes) (PP (PP (IN at) (NP (NN night))) (, ,) (CC or) (RB because) (PP (IN of) (NP (PRP$ its) (JJ eyelike) (NN shape)))))))))) (. .)))
Perhaps it was called so because of its arm like shape.
( Perhaps ( it ( ( was ( called ( so ( because ( of ( ( its arm ) ( like shape ) ) ) ) ) ) ) . ) ) )
(ROOT (S (ADVP (RB Perhaps)) (NP (PRP it)) (VP (VBD was) (VP (VBN called) (PP (ADVP (RB so)) (IN because) (IN of) (NP (NP (PRP$ its) (NN arm)) (PP (IN like) (NP (NN shape))))))) (. .)))