Stairs may be collapsed.Logical formLearned from4 sentences. Stairs may pertain-to a monument.Logical formLearned from4 sentences. Stairs can be in an (apartment building).Logical formLearned from4 sentences. Stairs may hit a homer.Logical formLearned from4 sentences. A fire may block stairs.Logical formLearned from4 sentences. A tank may block stairs.Logical formLearned from4 sentences. Stairs may lead to a compound.Logical formLearned from4 sentences. A male may cope with stairs.Logical formLearned from4 sentences. A bomb may be placed under stairs.Logical formLearned from4 sentences. Stairs may pertain-to an aircraft.Logical formLearned from4 sentences. Vehicles may be parked at a foot of stairs.Logical formLearned from4 sentences. Stairs may be shoned.Logical formLearned from4 sentences. Stairs may swing a hammer.Logical formLearned from4 sentences. Stairs may collapse in a (hospital building).Logical formLearned from4 sentences. Stairs can be high.Logical formLearned from4 sentences.