An average (life span) may pertain-to persons.Logical formLearned from6 sentences. A (life span) may pertain-to a (baby boom generation).Logical formLearned from6 sentences. (Life spans) may pertain-to today.Logical formLearned from6 sentences. A span can be covered.Logical formLearned from6 sentences. A span may pertain-to a season.Logical formLearned from6 sentences. A span may pertain-to a company.Logical formLearned from6 sentences. A span can be constituted-of-or-filled-with grades.Logical formLearned from6 sentences. (Life spans) can be projected.Logical formLearned from6 sentences. A span may undergo a removal.Logical formLearned from6 sentences. Some rbis can be in a span.Logical formLearned from6 sentences. A span can be constituted-of-or-filled-with mules.Logical formLearned from6 sentences. A span can be constituted-of-or-filled-with influence.Logical formLearned from6 sentences. A period may describe a span of years.Logical formLearned from6 sentences. A span may pertain-to a vault.Logical formLearned from6 sentences. Some arches can be constituted-of-or-filled-with span.Logical formLearned from6 sentences.