Original sentence: Churchill (born October 2, 1947) is a tenured professor of ethnic studies at University of Colorado at Boulder and co-chairman of the American Indian Movement of Colorado (Colorado AIM)
Edited sentence: Churchill (born October 2, 1947) is an American academic and activist of mixed white and Native American heritage.The author of many books and articles, he is a tenured professor of ethnic studies at University of Colorado at Boulder and co-chairman of the American Indian Movement of Colorado (Colorado AIM)