A person can be a part of some rivalries.Logical formLearned from9 sentences. A rivalry may pertain-to 1970s.Logical formLearned from9 sentences. A rivalry may be play_outed.Logical formLearned from9 sentences. A rivalry can be between some brothers.Logical formLearned from9 sentences. Families may be separated in a rivalry.Logical formLearned from9 sentences. A rivalry can be to a level.Logical formLearned from9 sentences. Rivalry may date.Logical formLearned from9 sentences. A backdrop can be constituted-of-or-filled-with rivalries.Logical formLearned from9 sentences. Theirs can be a rivalry.Logical formLearned from9 sentences. A rivalry may persist.Logical formLearned from9 sentences. Rivalries can be among a tribe.Logical formLearned from9 sentences. A tale can be constituted-of-or-filled-with (sibling rivalry).Logical formLearned from9 sentences. Rivalries can be fierce.Logical formLearned from9 sentences. A (superpower rivalry) can be fierce.Logical formLearned from9 sentences. A rivalry can be between some superpowers.Logical formLearned from9 sentences.