<http://schema.org/description>
"A study of 473 sets of twins followed since birth found that compared to single-born children, 47 percent of 24-month-old identical twins had language delay compared to 31 percent of non-identical twins. Overall, twins had twice the rate of late language emergence of single-born children. None of the children had disabilities affecting language acquisition."^^<http://www.w3.org/2001/XMLSchema#string>
<http://medicalxpress.com/news/2014-07-twin-language-due-nature-nurture.html>