Complex sentence: It hosted countless wedding receptions and parties for Chicago's elite, including a massive banquet held when Amelia Earhart returned triumphantly in 1928 to the Hyde Park neighborhood where she had attended high school.
Split into simpler sentences: It hosted countless wedding receptions and parties for Chicago's elite. A massive banquet was held when Amelia Earhart returned triumphantly in 1928 to the Hyde Park neighborhood where she had attended high school.