to seem as long as the two year affair which is its subject 
(ROOT (S (VP (TO to) (VP (VB seem) (S (ADJP (ADJP (RB as) (RB long)) (PP (IN as) (NP (NP (DT the) (NML (CD two) (NN year)) (NN affair)) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (NP (PRP$ its) (NN subject)))))))))))))
(ROOT (S (VP (TO ) (VP (VB ) (S (ADJP (ADJP (RB ) (RB )) (PP (IN ) (NP (NP (DT ) (NML (CD ) (NN )) (NN )) (SBAR (WHNP (WDT )) (S (VP (VBZ ) (NP (PRP$ ) (NN )))))))))))))