Read the following passage and answer if the question is true or false.
Passage: A grizzly--polar bear hybrid (Super Bear) (also named grolar bear or pizzly bear or nanulak) is a rare ursid hybrid that has occurred both in captivity and in the wild. In 2006, the occurrence of this hybrid in nature was confirmed by testing the DNA of a unique-looking bear that had been shot near Sachs Harbour, Northwest Territories on Banks Island in the Canadian Arctic.

Question: can a grizzly bear mate with a polar bear?

Is the answer True or False? Respond with only "True" or "False" and no additional text.
True.