Measures can be protective.Logical formLearned from4 552 sentences. An effect can be protective.Logical formLearned from2 516 sentences. Factors can be protective.Logical formLearned from1 489 sentences. A cover can be protective.Logical formLearned from1 249 sentences. A layer can be protective.Logical formLearned from1 151 sentences. A shield can be protective.Logical formLearned from893 sentences. Effects can be protective.Logical formLearned from851 sentences. A case can be protective.Logical formLearned from768 sentences. A covering can be protective.Logical formLearned from706 sentences. Devices can be protective.Logical formLearned from692 sentences. Gloves can be protective.Logical formLearned from687 sentences. A role can be protective.Logical formLearned from641 sentences. A measure can be protective.Logical formLearned from614 sentences. A wall can be protective.Logical formLearned from541 sentences. An (ozone layer) can be protective.Logical formLearned from487 sentences.