Some wells may be contaminated.Logical formLearned from26 sentences. A well can be inexhaustible.Logical formLearned from26 sentences. A well can be productive.Logical formLearned from26 sentences. Wells can be directional.Logical formLearned from26 sentences. A well can be municipal.Logical formLearned from26 sentences. A well may be built.Logical formLearned from26 sentences. Wells can be tainted.Logical formLearned from26 sentences. Wells can be completed.Logical formLearned from26 sentences. A well can be in a country.Logical formLearned from25 sentences. (Oil wells) can be exploratory.Logical formLearned from25 sentences. A well may pertain-to a family.Logical formLearned from25 sentences. A male may have a well.Logical formLearned from25 sentences. A well can be for water.Logical formLearned from25 sentences. A condition may pertain-to a well.Logical formLearned from25 sentences. A (relief well) may be drilled.Logical formLearned from25 sentences.