Complex sentence: The Hinz script became the standard for writing Yupik until about 1970, when it was replaced by a script developed by a group of native Yupik speakers and scholars at the University of Alaska.
Split into simpler sentences: The Hinz script became the standard for writing Yupik until about 1970. It was replaced by a script developed by a group of native Yupik speakers and linguists at the University of Alaska.