A group may be formed in 1990s.Logical formLearned from14 sentences. A river may be formed by a confluence of a river.Logical formLearned from14 sentences. A circle may form.Logical formLearned from14 sentences. A branch may be formed.Logical formLearned from14 sentences. A band may be formed by guitarist.Logical formLearned from14 sentences. A male may form a gang.Logical formLearned from14 sentences. A dam may form reservoir.Logical formLearned from14 sentences. A range may be formed.Logical formLearned from14 sentences. Commissions may be formed.Logical formLearned from14 sentences. Structures may be formed by bedforms.Logical formLearned from14 sentences. A pattern may form.Logical formLearned from14 sentences. Objects may be formed.Logical formLearned from14 sentences. Societies may be formed.Logical formLearned from14 sentences. A committee may form.Logical formLearned from14 sentences. Students may be formed.Logical formLearned from14 sentences.