question: Newer systems know where and how many people are at a location for what reasons ?
answer: either for the purposes of evacuating the building or for security reasons
turker_answer: Newer systems know where and how many people are at a location for the purposes of evacuating the building or for security reasons .
rule-based: Newer systems know either for the purposes of evacuating the building or for security reasons and how many people are at a location for what reasons .