Leaders can be formidable.Logical formLearned from26 sentences. An (air defense system) can be formidable.Logical formLearned from26 sentences. Assets can be formidable.Logical formLearned from26 sentences. A structure can be formidable.Logical formLearned from26 sentences. Years can be formidable.Logical formLearned from25 sentences. A defence can be formidable.Logical formLearned from25 sentences. A burden can be formidable.Logical formLearned from25 sentences. (Screen heroes) can be formidable.Logical formLearned from25 sentences. A militia can be formidable.Logical formLearned from25 sentences. (Negotiating skills) can be formidable.Logical formLearned from25 sentences. A sight can be formidable.Logical formLearned from24 sentences. A goal can be formidable.Logical formLearned from24 sentences. A capability can be formidable.Logical formLearned from24 sentences. A difficulty can be formidable.Logical formLearned from24 sentences. A defender can be formidable.Logical formLearned from24 sentences.