Complex sentence: As the only member of her immediate family with United States citizenship (by virtue of being born in the country), she remained in America when her parents and older brother were deported back to Colombia when she was 14.
Split into simpler sentences: As the only American-born child in her family, she remained in America when the rest of her family was deported back to Colombia. Both of her parents and her older brother were deported to Colombia when she was 14.