(Oil companies) may drill.Logical formLearned from18 sentences. Persons may drill in a country.Logical formLearned from18 sentences. A formation may be drilled.Logical formLearned from18 sentences. A hole may be drilled in a skull.Logical formLearned from18 sentences. A person may drill a well.Logical formLearned from17 sentences. Persons may drill a way to (energy independence).Logical formLearned from17 sentences. A male may drill a hole.Logical formLearned from17 sentences. A US-city may be drilled.Logical formLearned from17 sentences. A person may drill holes.Logical formLearned from17 sentences. A person may drill a person.Logical formLearned from17 sentences. A person may drill a hole.Logical formLearned from17 sentences. Boreholes may be drilled.Logical formLearned from17 sentences. Workers may drill holes.Logical formLearned from17 sentences. A borehole may be drilled.Logical formLearned from16 sentences. Someone may be drilled.Logical formLearned from16 sentences.