In some respects, it may not be long before certain aspects of dialect geography will be largely historical.
( ( In ( some respects ) ) ( , ( it ( ( ( may not ) ( ( be long ) ( before ( ( ( certain aspects ) ( of ( dialect geography ) ) ) ( will ( be ( largely historical ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (DT some) (NNS respects))) (, ,) (NP (PRP it)) (VP (MD may) (RB not) (VP (VB be) (ADJP (JJ long)) (SBAR (IN before) (S (NP (NP (JJ certain) (NNS aspects)) (PP (IN of) (NP (NN dialect) (NN geography)))) (VP (MD will) (VP (VB be) (ADJP (RB largely) (JJ historical)))))))) (. .)))
It may not be too long before parts of dialect geography are historical. 
( It ( ( ( may not ) ( ( be ( too long ) ) ( before ( ( parts ( of ( dialect geography ) ) ) ( are historical ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (MD may) (RB not) (VP (VB be) (ADJP (RB too) (JJ long)) (SBAR (IN before) (S (NP (NP (NNS parts)) (PP (IN of) (NP (NN dialect) (NN geography)))) (VP (VBP are) (ADJP (JJ historical))))))) (. .)))