( ( By ( ( the shape ) ( of ( its ( square-nosed head ) ) ) ) ) ( I ( ( could ( see ( that ( it ( was ( ( the male ) ( of ( the species ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (PP (IN By) (NP (NP (DT the) (NN shape)) (PP (IN of) (NP (PRP$ its) (JJ square-nosed) (NN head))))) (NP (PRP I)) (VP (MD could) (VP (VB see) (SBAR (IN that) (S (NP (PRP it)) (VP (VBD was) (NP (NP (DT the) (NN male)) (PP (IN of) (NP (DT the) (NN species))))))))) (. .)))
By the shape of its square-nosed head I could see that it was the male of the species.
(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))) (. .)))