Complex sentence: Concerned, Chris tells Rose that they need to leave immediately, and while Rose gets her bag he finds a box in Rose's closet containing photographs that feature Rose with a series of black people, including Walter and Georgina.
Split into simpler sentences: Concerned, Chris tells Rose that they need to leave immediately. While Rose gets her bag, he finds a box in Rose's closet containing photographs featuring her with a series of black people, including Walter and Georgina.