claim: Live Nation Entertainment is a worldwide entertainment company.
evidence: Rhetaugh Etheldra Graves Dumas -LRB- 1928 -- 2007 -RRB- was an American nurse , professor and health administrator .. Dumas was the first black woman to serve as a dean at the University of Michigan .. University of Michigan. University of Michigan. She served as deputy director of the National Institute of Mental Health , becoming the first nurse , female , or African-American to hold that position .. National Institute of Mental Health. National Institute of Mental Health. She is said to have been the first nurse to conduct clinical experiments that evaluated nursing practices .