will enjoy seeing how both evolve 
(ROOT (VP (MD will) (VP (VB enjoy) (S (VP (VBG seeing) (SBAR (WHADVP (WRB how)) (S (NP (DT both)) (VP (VBP evolve)))))))))
(ROOT (VP (MD ) (VP (VB ) (S (VP (VBG ) (SBAR (WHADVP (WRB )) (S (NP (DT )) (VP (VBP )))))))))