( ( QR ( Code symbols ) ) ( ( ( ( are ( square ( in shape ) ) ) and ) ( ( can easily ) ( be ( ( identified ( by ( ( their ( finder pattern ) ) ( of nested ) ) ) ) ( ( alternating ( ( ( dark and ) light ) squares ) ) ( at ( ( three corners ) ( of ( the symbol ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP QR) (NNP Code) (NNS symbols)) (VP (VP (VBP are) (NP (NP (NN square)) (PP (IN in) (NP (NN shape))))) (CC and) (VP (MD can) (ADVP (RB easily)) (VP (VB be) (VP (VBN identified) (PP (IN by) (NP (NP (PRP$ their) (NN finder) (NN pattern)) (PP (IN of) (NP (NN nested))))) (S (VP (VBG alternating) (NP (ADJP (JJ dark) (CC and) (JJ light)) (NNS squares)) (PP (IN at) (NP (NP (CD three) (NNS corners)) (PP (IN of) (NP (DT the) (NN symbol))))))))))) (. .)))
QR Code symbols are square in shape and can easily be identified by their finder pattern of nested alternating dark and light squares at three corners of the symbol.
(ROOT (S (PP (IN In) (NP (DT a) (JJ pedigree) (NN chart))) (NP (DT the) (NNS squares) (NN shape)) (VP (VBZ symbolizes) (NP (NNS males))) (. .)))