bi_50 := v-ditrVid-ob2Postp-suAg_obAddr_ob2Endpt-ASKING 
bi_51 := v-trVid-obPostp-suAg_obEndpt_vidObLoc-ASKING 
bi_52 := v-ditr-obPostp-suAg_obTh_ob2Endpt-ASKING 
fitiri_288 := v-tr-obPostp-suAg_obLoc-ASKING_ABOUT 
