A surface may pertain-to a metal.Logical formLearned from166 sentences. A metal can be radioactive.Logical formLearned from163 sentences. Metals may undergo a use.Logical formLearned from159 sentences. Variety can be constituted-of-or-filled-with metals.Logical formLearned from158 sentences. Demand can be for a precious metal.Logical formLearned from154 sentences. Metals can be dissimilar.Logical formLearned from154 sentences. (Metal stents) can be bare.Logical formLearned from153 sentences. A metal can be mangled.Logical formLearned from148 sentences. A metal can be underground.Logical formLearned from147 sentences. Levels can be constituted-of-or-filled-with metals.Logical formLearned from145 sentences. (Metal detectors) may undergo a use.Logical formLearned from144 sentences. A bit can be constituted-of-or-filled-with metal.Logical formLearned from143 sentences. A mass can be constituted-of-or-filled-with metal.Logical formLearned from142 sentences. (Metal prongs) may pertain-to a (power adapter).Logical formLearned from141 sentences. Heavy metals may undergo concentrations.Logical formLearned from139 sentences.