A ninja may be used.Logical formLearned from2 sentences. A ninja can be in a service of a clan.Logical formLearned from2 sentences. A ninja may be dressed.Logical formLearned from2 sentences. A long line can be constituted-of-or-filled-with ninja.Logical formLearned from2 sentences. A ninja can be phantom.Logical formLearned from2 sentences. A (ninja assistant) may pertain-to a male.Logical formLearned from2 sentences. A (ninja clan) can be secretive.Logical formLearned from2 sentences. A master may pertain-to a (ninja clan).Logical formLearned from2 sentences. A ninja can be at a time.Logical formLearned from2 sentences. A ninja can be fierce.Logical formLearned from2 sentences. A brother can be a ninja.Logical formLearned from2 sentences. A ninja may pertain-to a hand.Logical formLearned from2 sentences. A ninja can be lethal.Logical formLearned from2 sentences. A ninja can be experts.Logical formLearned from2 sentences. A hand can be an order of mystical ninja.Logical formLearned from2 sentences.