( ( Square symbols ) ( ( ( are ( almost always ) ) ( used ( ( ( to ( represent males ) ) , ) ( whilst ( circles ( are ( used ( for females ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Square) (NNS symbols)) (VP (VBP are) (ADVP (RB almost) (RB always)) (VP (VBN used) (S (VP (TO to) (VP (VB represent) (NP (NNS males)))) (, ,) (SBAR (IN whilst) (S (NP (NNS circles)) (VP (VBP are) (VP (VBN used) (PP (IN for) (NP (NNS females)))))))))) (. .)))
Square symbols are almost always used to represent males, whilst circles are used for females.
(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))) (. .)))