Index can be to literature.Logical formLearned from31 sentences. An array can be at an index.Logical formLearned from31 sentences. Persons may use an (index system).Logical formLearned from31 sentences. An index can be constituted-of-or-filled-with manufacturing.Logical formLearned from31 sentences. An index can be for some months.Logical formLearned from31 sentences. Indexes can be in a country.Logical formLearned from31 sentences. Indexes may be used.Logical formLearned from31 sentences. A (stock index) may pertain-to a nation.Logical formLearned from31 sentences. Some stocks can be within an index.Logical formLearned from31 sentences. An index may show a drop.Logical formLearned from31 sentences. A (capacity index) may measure a rate.Logical formLearned from31 sentences. A plunge can be in a (stock index).Logical formLearned from31 sentences. An index may rise for some months.Logical formLearned from31 sentences. An index may drop to a level.Logical formLearned from31 sentences. An (index reading) can be negative.Logical formLearned from31 sentences.