A cell may phone rings.Logical formLearned from63 sentences. (Stem cell research) can be controversial.Logical formLearned from63 sentences. (Stem cells) may undergo a derivation.Logical formLearned from63 sentences. Cells may pertain-to a retina.Logical formLearned from63 sentences. (Cell phones) may pertain-to the world.Logical formLearned from63 sentences. Contents may pertain-to cells.Logical formLearned from63 sentences. Cells can be accessible.Logical formLearned from62 sentences. Cells can be fixed.Logical formLearned from62 sentences. Cells may undergo a loss.Logical formLearned from62 sentences. Cells may be damaged.Logical formLearned from62 sentences. Images can be constituted-of-or-filled-with cells.Logical formLearned from62 sentences. Cells may move.Logical formLearned from62 sentences. A door can be to a cell.Logical formLearned from62 sentences. A person may purchase a (cell phone).Logical formLearned from62 sentences. (Cell phones) can be mobile.Logical formLearned from62 sentences.