Context: Advertising is common in healthcare journals as well as through more mainstream media routes. In some countries, notably the US, they are allowed to advertise directly to the general public. Pharmaceutical companies generally employ sales people (often called 'drug reps' or, an older term, 'detail men') to market directly and personally to physicians and other healthcare providers. In some countries, notably the US, pharmaceutical companies also employ lobbyists to influence politicians. Marketing of prescription drugs in the US is regulated by the federal Prescription Drug Marketing Act of 1987.

Question: "Drug reps" are usually hired by what type of firms?
Answer: Pharmaceutical companies

Question: What law regulates drug marketing in the US?
Answer: Prescription Drug Marketing Act of 1987

Question: Who do drug reps market to?
Answer: directly and personally to physicians

Question: "US reps" are usually hired by what type of firms?
Answer: Unanswerable

Question: What law regulates drug marketing in some countries?
Answer: Unanswerable

Question: Who do US reps market to? 
Answer: Unanswerable

Question: Who do US companies generally employ?
Answer: Unanswerable

Question: What is marketing of media in the US regulated by?
Answer: Unanswerable