Complex sentence: Coming out of a long silence, she opened her eyes one afternoon and wondered aloud what had happened to all her friends from that time, and in that I moment I knew fully what she, and all of them, had lost.
Split into simpler sentences: Coming out of a long silence, she opened her eyes one afternoon and wondered aloud what had happened to all her friends from that time. It was in that moment that I truly understood what she, and all of them, had lost.