which was shot two years ago 
(ROOT (SBAR (WHNP (WDT which)) (S (VP (VBD was) (VP (VBN shot) (PP (NP (CD two) (NNS years)) (RB ago)))))))
(ROOT (SBAR (WHNP (WDT )) (S (VP (VBD ) (VP (VBN ) (PP (NP (CD ) (NNS )) (RB )))))))