question: What has made the no photography rule hard to enforce in the Rotunda for the Charters of Freedom ?
answer: advent of cameras with automatic flashes
turker_answer: The advent of cameras with automatic flashes has made the no photography rule hard to enforce in the Rotunda for the Charters of Freedom .
rule-based: Advent of cameras with automatic flashes has made the no photography rule hard to enforce in the Rotunda for the Charters of Freedom .