Tremor can be a symptom.Logical formLearned from9 sentences. A tremor can be vocal.Logical formLearned from9 sentences. Tremors may be caused by a global (credit crisis).Logical formLearned from9 sentences. A tremor can be underwater.Logical formLearned from9 sentences. Tremors may start.Logical formLearned from9 sentences. A tremor may strike an area.Logical formLearned from9 sentences. An agency may detect tremors.Logical formLearned from9 sentences. A tremor can be at some p.m..Logical formLearned from9 sentences. Tremors may shake a country.Logical formLearned from9 sentences. Tremors can be constituted-of-or-filled-with magnitude.Logical formLearned from9 sentences. Some homes may be damaged by a tremor.Logical formLearned from9 sentences. Tremors may be caused by lavas.Logical formLearned from9 sentences. A swarm can be constituted-of-or-filled-with tremors.Logical formLearned from9 sentences. An epicenter of a tremor may occur at some pm.Logical formLearned from9 sentences. Schools can be in a tremor.Logical formLearned from9 sentences.