it 's hard to figure the depth of these two literary figures , and even the times in which they lived . 
(ROOT (S (NP (NP (PRP it))) (VP (VBZ 's) (ADJP (JJ hard)) (S (VP (TO to) (VP (VB figure) (NP (NP (NP (DT the) (NN depth)) (PP (IN of) (NP (DT these) (CD two) (JJ literary) (NNS figures)))) (, ,) (CC and) (NP (NP (RB even) (DT the) (NNS times)) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (PRP they)) (VP (VBD lived)))))))))) (. .)))
(ROOT (S (NP (NP (PRP ))) (VP (VBZ ) (ADJP (JJ )) (S (VP (TO ) (VP (VB ) (NP (NP (NP (DT ) (NN )) (PP (IN ) (NP (DT ) (CD ) (JJ ) (NNS )))) (, ) (CC ) (NP (NP (RB ) (DT ) (NNS )) (SBAR (WHPP (IN ) (WHNP (WDT ))) (S (NP (PRP )) (VP (VBD )))))))))) (. )))