A form can be mysterious.Logical formLearned from226 sentences. A dark matter can be mysterious.Logical formLearned from224 sentences. A phenomenon can be mysterious.Logical formLearned from218 sentences. An organization can be mysterious.Logical formLearned from214 sentences. Figures can be mysterious.Logical formLearned from209 sentences. A letter can be mysterious.Logical formLearned from206 sentences. Origins can be mysterious.Logical formLearned from206 sentences. A case can be mysterious.Logical formLearned from205 sentences. A benefactor can be mysterious.Logical formLearned from205 sentences. A box can be mysterious.Logical formLearned from205 sentences. A being can be mysterious.Logical formLearned from201 sentences. A (phone call) can be mysterious.Logical formLearned from193 sentences. A source can be mysterious.Logical formLearned from191 sentences. A light can be mysterious.Logical formLearned from188 sentences. A girl can be mysterious.Logical formLearned from186 sentences.