Solid tumors can be refractory.Logical formLearned from12 sentences. A surface can be solid.Logical formLearned from12 sentences. A hull can be solid.Logical formLearned from12 sentences. Relievers can be solid.Logical formLearned from12 sentences. A pellet can be solid.Logical formLearned from12 sentences. An offensive can be solid.Logical formLearned from12 sentences. A stronghold can be solid.Logical formLearned from12 sentences. A rib can be solid.Logical formLearned from12 sentences. A cd can be solid.Logical formLearned from12 sentences. (Masonry walls) can be solid.Logical formLearned from12 sentences. A (sea ice) can be solid.Logical formLearned from12 sentences. A reaction can be solid.Logical formLearned from12 sentences. Piers can be solid.Logical formLearned from12 sentences. Remains can be solid.Logical formLearned from12 sentences. Solid tumors may undergo a development.Logical formLearned from12 sentences.