British forces may fire heavy artillery on locations of mortars.Logical formLearned from4 sentences. Locations may pertain-to mortars.Logical formLearned from4 sentences. Troops may unearth a mortar.Logical formLearned from4 sentences. An army may respond with mortars.Logical formLearned from4 sentences. A sack may contain mortars.Logical formLearned from4 sentences. Troops may be attacked by mortars.Logical formLearned from4 sentences. Some boxes can be constituted-of-or-filled-with mortars.Logical formLearned from4 sentences. Fighters may fire mortars on persons.Logical formLearned from4 sentences. Shooting may fire mortars on a country.Logical formLearned from4 sentences. An attack can be with (mortar bombs).Logical formLearned from4 sentences. (Fundamentalist guerrillas) may fire mortars.Logical formLearned from4 sentences. A (mortar attack) can be on positions.Logical formLearned from4 sentences. Some mortars may be fired at a (police patrol).Logical formLearned from4 sentences. Men may fire mortars.Logical formLearned from4 sentences. Fighters may fire a number of mortars.Logical formLearned from4 sentences.