( ( A ( mirror image ) ) ( ( is created ) . ) )
(ROOT (S (NP (DT A) (NN mirror) (NN image)) (VP (VBZ is) (VP (VBN created))) (. .)))
A mirror image is created.
(ROOT (S (NP (NNP Plane) (NNS mirrors)) (VP (VBP work) (SBAR (IN because) (S (NP (DT the) (JJ light) (NNS rays)) (VP (VBP create) (NP (NP (DT a) (JJ virtual) (NN image)) (PP (IN behind) (NP (DT the) (NN mirror)))))))) (. .)))