He was : it was emerald calculations .
(ROOT_0 (S_0 (ATS_3 (ATS_4 (S_1 (NP_1 (PRP_0 He)) (VP_5 (VBD_1 was))) (COLON_0 :)) (S_1 (NP_0 (PRP_1 it)) (VP_5 (VBD_1 was) (NP_3 (JJ_1 emerald) (NNS_0 calculations))))) (DOT_0 .)))