There was no evidence of dissection.
 there is no evidence of dissection
(ROOT (S (NP (EX There)) (VP (VBD was) (NP (NP (DT no) (NN evidence)) (PP (IN of) (NP (NN dissection))))) (. .)))
(ROOT (S (NP (EX there)) (VP (VBZ is) (NP (NP (DT no) (NN evidence)) (PP (IN of) (NP (NN dissection)))))))
( There ( ( was ( ( no evidence ) ( of dissection ) ) ) . ) )
( there ( is ( ( no evidence ) ( of dissection ) ) ) )