Bones can be fragile.Logical formLearned from52 sentences. A paper can be fragile.Logical formLearned from51 sentences. Progress can be fragile.Logical formLearned from51 sentences. Infants can be fragile.Logical formLearned from50 sentences. An industry can be fragile.Logical formLearned from50 sentences. An age can be fragile.Logical formLearned from49 sentences. A tundra can be fragile.Logical formLearned from49 sentences. An appearance can be fragile.Logical formLearned from49 sentences. (Security gains) can be fragile.Logical formLearned from49 sentences. A surface can be fragile.Logical formLearned from48 sentences. (Barrier islands) can be fragile.Logical formLearned from48 sentences. An economy can be fragile.Logical formLearned from48 sentences. A (peace bid) can be fragile.Logical formLearned from48 sentences. A being can be fragile.Logical formLearned from47 sentences. An order can be fragile.Logical formLearned from47 sentences.