A ninja can be black.Logical formLearned from35 sentences. A ninja can be skilled.Logical formLearned from33 sentences. A ninja can be stealthy.Logical formLearned from31 sentences. (Ninja skills) may pertain-to a male.Logical formLearned from29 sentences. Ninjas can be liked.Logical formLearned from29 sentences. A ninja can be powerful.Logical formLearned from27 sentences. A female can be a ninja.Logical formLearned from27 sentences. A group can be constituted-of-or-filled-with ninja.Logical formLearned from26 sentences. A bunch can be constituted-of-or-filled-with ninjas.Logical formLearned from25 sentences. A ninja can be elite.Logical formLearned from24 sentences. A ninja can be white.Logical formLearned from24 sentences. Ninjas can be evil.Logical formLearned from24 sentences. A way may pertain-to a ninja.Logical formLearned from24 sentences. A ninja can be mysterious.Logical formLearned from23 sentences. A person may become a ninja.Logical formLearned from23 sentences.