Fireworks may go_off in a bus.Logical formLearned from4 sentences. A bomb may go_off at a courtroom.Logical formLearned from4 sentences. An explosion may go_off in a van.Logical formLearned from4 sentences. A grenade may go_off in a van.Logical formLearned from4 sentences. Bombs may go_off before dawn.Logical formLearned from4 sentences. Some (suicide car bombs) may go_off.Logical formLearned from4 sentences. A male may go_off with a (knee injury).Logical formLearned from4 sentences. Persons may go_off a bit.Logical formLearned from4 sentences. Some bombs may go_off within some minutes.Logical formLearned from4 sentences. An (opening ceremony) may go_off without a hitch.Logical formLearned from4 sentences. A blast may go_off between a (subway station).Logical formLearned from4 sentences. A parcel may go_off.Logical formLearned from4 sentences. Bombs may go_off in a capital.Logical formLearned from4 sentences. A blast may go_off at a checkpoint.Logical formLearned from4 sentences. Some blasts may go_off synagogues.Logical formLearned from4 sentences.