( It ( ( ( is also ) ( possible ( to ( ( ( analyse ( ( the shape ) ( of ( ( the pulses ) ( -LRB- ( ( once ( they ( have ( passed ( through ( ( ( the ionosphere ) and ) ( ( the receiver ) ( they ( are ( ( no ( longer square ) ) ( in shape ) ) ) ) ) ) ) ) ) ) ) -RRB- ) ) ) ) ) ) and ) ( ( determine ( from ( the shape ) ) ) ( where ( ( the symbols ) are ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ is) (ADVP (RB also)) (ADJP (JJ possible) (S (VP (TO to) (VP (VP (VB analyse) (NP (NP (DT the) (NN shape)) (PP (IN of) (NP (NP (DT the) (NNS pulses)) (PRN (-LRB- -LRB-) (SBAR (IN once) (S (NP (PRP they)) (VP (VBP have) (VP (VBN passed) (PP (IN through) (NP (NP (DT the) (NN ionosphere)) (CC and) (NP (NP (DT the) (NN receiver)) (SBAR (S (NP (PRP they)) (VP (VBP are) (NP (NP (DT no) (JJR longer) (NN square)) (PP (IN in) (NP (NN shape)))))))))))))) (-RRB- -RRB-)))))) (CC and) (VP (VB determine) (PP (IN from) (NP (DT the) (NN shape))) (SBAR (WHADVP (WRB where)) (S (NP (DT the) (NNS symbols)) (VP (VBP are)))))))))) (. .)))
It is also possible to analyse the shape of the pulses (once they have passed through the ionosphere and the receiver they are no longer square in shape) and determine from the shape where the symbols are.
(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))) (. .)))