An end may pertain-to an (age span).Logical formLearned from5 sentences. Spans may undergo a replacement.Logical formLearned from5 sentences. An effect can be on a (life span).Logical formLearned from5 sentences. A span can be half-time.Logical formLearned from5 sentences. A (life span) can be constituted-of-or-filled-with some weeks.Logical formLearned from5 sentences. A span may pertain-to a course.Logical formLearned from5 sentences. A span can be constituted-of-or-filled-with earth.Logical formLearned from5 sentences. A (life span) may decrease.Logical formLearned from5 sentences. A (life span) may pertain-to animals.Logical formLearned from5 sentences. Persons may add some years to (life spans).Logical formLearned from5 sentences. A hormone may extend a (life span) of mice.Logical formLearned from5 sentences. A (life span) can be abbreviated.Logical formLearned from5 sentences. An upper deck may pertain-to a span.Logical formLearned from5 sentences. A length can be ideal for (attention spans).Logical formLearned from5 sentences. An (attention span) can be fleeting.Logical formLearned from5 sentences.