Original sentence: They scored again with the McPherson-penned black power anthem "Black Seeds Keep on Growing," but tragedy struck in 1971: McPherson, who had suddenly taken ill with leukemia, died unexpectedly
Edited sentence: They scored again with the McPherson-penned black power anthem "Black Seeds Keep on Growing," but tragedy struck in 1971: McPherson, who had suddenly taken ill with leukemia, passed away unexpectedly