Stems can be winged.Logical formLearned from13 sentences. (Stem cells) may undergo a fate.Logical formLearned from13 sentences. A section may pertain-to a stem.Logical formLearned from13 sentences. Stems can be thick.Logical formLearned from13 sentences. A stem can be rigid.Logical formLearned from13 sentences. Scientists may conduct (stem cell research).Logical formLearned from13 sentences. (Stem cells) may hold a promise.Logical formLearned from13 sentences. A hallmark of embryonic (stem cells) can be an ability.Logical formLearned from13 sentences. Donors can be for (stem cell research).Logical formLearned from13 sentences. A pioneer can be in (stem cell research).Logical formLearned from13 sentences. A male may create (stem cells).Logical formLearned from13 sentences. (Stem cell research) may lead to cures.Logical formLearned from13 sentences. A use of embryonic (stem cells) may assure a creation of mice.Logical formLearned from13 sentences. (Stem cells) may be pulled from human embryos.Logical formLearned from13 sentences. A stem can be woody.Logical formLearned from13 sentences.