Complex sentence: Scholar Lyman B. Hagen agreed and pointed out that Angelou had to re-examine her lingering prejudices when faced with the broader world full of whites, but it was a complex process because most of Angelou's experiences with whites were positive during this time.
Split into simpler sentences: Scholar Lyman B. Hagen agreed and pointed out that Angelou had to re-examine her lingering prejudices when faced with the broader world full of whites. As Hagen also indicated, however, this was a complex process, since most of Angelou's experiences with whites were positive during this time.