A response can be to a phenomenon.Logical formLearned from19 sentences. A phenomenon may pertain-to an age.Logical formLearned from19 sentences. A phenomenon can be personal.Logical formLearned from19 sentences. A phenomenon of reciprocity may be seen by evolutionary biologists.Logical formLearned from19 sentences. A name can be for a phenomenon.Logical formLearned from19 sentences. Blogs can be a phenomenon.Logical formLearned from19 sentences. A basis may pertain-to a phenomenon.Logical formLearned from19 sentences. A person may observe a phenomenon.Logical formLearned from19 sentences. Phenomena can be interesting.Logical formLearned from19 sentences. A phenomenon can be fascinating.Logical formLearned from19 sentences. A movement can be a phenomenon.Logical formLearned from19 sentences. A phenomenon may pertain-to a month.Logical formLearned from19 sentences. A phenomenon can be a male.Logical formLearned from19 sentences. A phenomenon may pertain-to a decade.Logical formLearned from19 sentences. A phenomenon can be unusual.Logical formLearned from19 sentences.