Beyoncé:

On January 7, 2012, Beyoncé gave birth to her first child, a daughter, Blue Ivy Carter, at Lenox Hill Hospital in New York. Five months later, she performed for four nights at Revel Atlantic City's Ovation Hall to celebrate the resort's opening, her first performances since giving birth to Blue Ivy.

Please answer a question about this article. If the question is unanswerable, say "unanswerable". Beyonce's first child is named what?
Blue Ivy Carter