Ancestors may pertain-to an (event window).Logical formLearned from2 sentences. A grab may exist on an ancestor of grab_window.Logical formLearned from2 sentences. An ancestor can be constituted-of-or-filled-with grab_window.Logical formLearned from2 sentences. Events may be propagated to ancestors of an (event window).Logical formLearned from2 sentences. Ancestors can be in a transmission of a text.Logical formLearned from2 sentences. Ancestors may undergo explorations.Logical formLearned from2 sentences. Some families may share a common ancestor.Logical formLearned from2 sentences. Ancestors can be tailed.Logical formLearned from2 sentences. A relict may pertain-to ancestors.Logical formLearned from2 sentences. An achievement may pertain-to ancestors.Logical formLearned from2 sentences. Ancestors may known that something-is-the-case.Logical formLearned from2 sentences. Ancestors may be changed.Logical formLearned from2 sentences. A tree may represent an (ancestor hierarchy).Logical formLearned from2 sentences. An object can be independent of an (ancestor object).Logical formLearned from2 sentences. An (ancestor object) can be after a creation.Logical formLearned from2 sentences.