A book may represent a milestone.Logical formLearned from5 sentences. Milestones may undergo timing.Logical formLearned from5 sentences. A milestone can be for a country.Logical formLearned from5 sentences. Milestones can be age-related.Logical formLearned from5 sentences. A list can be constituted-of-or-filled-with developmental milestones.Logical formLearned from5 sentences. A milestone may occur in a month.Logical formLearned from5 sentences. (Group milestones) may be updated.Logical formLearned from5 sentences. A moment can be a milestone.Logical formLearned from5 sentences. A milestone can be meaningless.Logical formLearned from5 sentences. Milestones can be quantifiable.Logical formLearned from5 sentences. A milestone can be for a us-state.Logical formLearned from5 sentences. Milestones can be in areas.Logical formLearned from5 sentences. Milestones can be well-defined.Logical formLearned from5 sentences. Variety can be constituted-of-or-filled-with milestones.Logical formLearned from5 sentences. Persons may reach milestones.Logical formLearned from5 sentences.