Authors may pertain-to an era.Logical formLearned from12 sentences. An era can be constituted-of-or-filled-with salaries.Logical formLearned from12 sentences. Eras can be constituted-of-or-filled-with American history.Logical formLearned from12 sentences. A new era can be for football.Logical formLearned from12 sentences. A figure may pertain-to a (rock era).Logical formLearned from12 sentences. An (era record) may pertain-to a country.Logical formLearned from12 sentences. A new era can be for a sport.Logical formLearned from12 sentences. Eras can be before pines.Logical formLearned from12 sentences. Some era can be at a US-city.Logical formLearned from12 sentences. Pioneers may pertain-to an era.Logical formLearned from12 sentences. An era may pertain-to (robber barons).Logical formLearned from12 sentences. Some years can be in an era.Logical formLearned from12 sentences. An era can be constituted-of-or-filled-with some strikeouts.Logical formLearned from12 sentences. An era can be sovereign.Logical formLearned from12 sentences. A technology may pertain-to an era.Logical formLearned from12 sentences.