Complex sentence: The William and Flora Hewlett Foundation is a private foundation, established by Hewlett-Packard cofounder William R. Hewlett and his wife Flora Lamson Hewlett in 1967, makes grants to support educational and cultural institutions and to advance certain social and environmental issues.
Split into simpler sentences: The William and Flora Hewlett Foundation is a private foundation, established by Hewlett-Packard cofounder William R. Hewlett and his wife Flora Lamson Hewlett in 1967. The Hewlett Foundation awards grants to support educational and cultural institutions and to advance certain social and environmental issues.