Cases can be rare.Logical formLearned from9 190 sentences. Occasions can be rare.Logical formLearned from8 162 sentences. An opportunity can be rare.Logical formLearned from7 847 sentences. Species can be rare.Logical formLearned from6 518 sentences. A form can be rare.Logical formLearned from4 061 sentences. An occurrence can be rare.Logical formLearned from3 635 sentences. An occasion can be rare.Logical formLearned from3 362 sentences. Instances can be rare.Logical formLearned from3 118 sentences. An event can be rare.Logical formLearned from3 076 sentences. A moment can be rare.Logical formLearned from3 066 sentences. An appearance can be rare.Logical formLearned from2 832 sentences. A disease can be rare.Logical formLearned from2 793 sentences. A chance can be rare.Logical formLearned from2 775 sentences. A case can be rare.Logical formLearned from2 464 sentences. A glimpse can be rare.Logical formLearned from2 405 sentences.