(Stem cells) can be rare.Logical formLearned from7 sentences. A flower can be on a stem.Logical formLearned from7 sentences. A stem can be dangerous.Logical formLearned from7 sentences. (Bone marrow stem cells) may pertain-to patients.Logical formLearned from7 sentences. A stem may pertain-to a us-state.Logical formLearned from7 sentences. (Brain stems) can be exposed.Logical formLearned from7 sentences. (Brain stems) may pertain-to characters.Logical formLearned from7 sentences. (Stem cells) may be found in a brain.Logical formLearned from7 sentences. Stems can be beautiful.Logical formLearned from7 sentences. A stem may pertain-to an artichoke.Logical formLearned from7 sentences. A flower can be with a stem.Logical formLearned from7 sentences. Stems may have a flavor.Logical formLearned from7 sentences. (Stem cells) can be from donors.Logical formLearned from7 sentences. Stem may be attached.Logical formLearned from7 sentences. A portion may pertain-to a (brain stem).Logical formLearned from7 sentences.