Your memories are probably very similar.
( ( Your memories ) ( ( ( are probably ) ( very similar ) ) . ) )
(ROOT (S (NP (PRP$ Your) (NNS memories)) (VP (VBP are) (ADVP (RB probably)) (ADJP (RB very) (JJ similar))) (. .)))
Your memories are vivid just like theirs.
( ( Your memories ) ( ( are ( vivid ( just ( like theirs ) ) ) ) . ) )
(ROOT (S (NP (PRP$ Your) (NNS memories)) (VP (VBP are) (ADJP (JJ vivid) (PP (RB just) (IN like) (NP (PRP theirs))))) (. .)))