Topics may pertain-to persons.Logical formLearned from594 sentences. A topic may pertain-to a day.Logical formLearned from585 sentences. Some stories can be on a topic.Logical formLearned from572 sentences. Topics can be diverse.Logical formLearned from564 sentences. A topic can be serious.Logical formLearned from564 sentences. A topic may be discussed.Logical formLearned from559 sentences. Topics can be timely.Logical formLearned from555 sentences. Topics can be difficult.Logical formLearned from538 sentences. A topic can be difficult.Logical formLearned from533 sentences. Discussions can be on topics.Logical formLearned from523 sentences. Topics can be constituted-of-or-filled-with concern.Logical formLearned from519 sentences. Topics can be mathematical.Logical formLearned from513 sentences. A person may see a topic.Logical formLearned from513 sentences. (Today topics) can be hot.Logical formLearned from508 sentences. Topics can be specialized.Logical formLearned from503 sentences.