Self-administration can be in rats.Logical formLearned from15 sentences. Rats can be naïve.Logical formLearned from15 sentences. Rats may undergo populations.Logical formLearned from15 sentences. A rat can be newborn.Logical formLearned from15 sentences. Rats may be injected.Logical formLearned from15 sentences. A (rat hole) may pertain-to a male.Logical formLearned from15 sentences. A rat can be dried.Logical formLearned from15 sentences. Water may be contaminated by (rat urine).Logical formLearned from15 sentences. A (rat race) may pertain-to a world-city.Logical formLearned from15 sentences. A brand can be constituted-of-or-filled-with (rat poison).Logical formLearned from15 sentences. A cage can be constituted-of-or-filled-with rats.Logical formLearned from15 sentences. Rats can be pets.Logical formLearned from15 sentences. A nest may pertain-to rats.Logical formLearned from15 sentences. A rat can be filthy.Logical formLearned from15 sentences. Rats may walk.Logical formLearned from14 sentences.