Topics may undergo an understanding.Logical formLearned from245 sentences. Some topics may be covered.Logical formLearned from245 sentences. Topics can be philosophical.Logical formLearned from245 sentences. A topic can be contentious.Logical formLearned from238 sentences. Topic may undergo a change.Logical formLearned from237 sentences. A country can be a topic.Logical formLearned from236 sentences. A nature may pertain-to a topic.Logical formLearned from236 sentences. A topic can be on an agenda.Logical formLearned from235 sentences. A topic can be constituted-of-or-filled-with importance.Logical formLearned from235 sentences. Research can be on a topic.Logical formLearned from233 sentences. Topics can be personal.Logical formLearned from233 sentences. A topic may be offered under a (topic identity).Logical formLearned from230 sentences. A person may get off topic.Logical formLearned from229 sentences. A topic can be dry.Logical formLearned from229 sentences. Persons may discuss a topic.Logical formLearned from228 sentences.