31.   Such systems have existed in some form for about a decade.

32.   Such a system has never existed and never will.

33.   Such so-called universal messaging systems already exist, but they are not especially easy to use.

34.   The system has existed for three decades, ever since the state began emptying its psychiatric wards.

35.   The US does not need to radically change its development system because a club system already exists.

36.   This address system exists because the people who created the Internet, mostly employees of universities and the federal government, wanted to make it easy to use.

37.   This has meant that no system exists to track potentially life-threatening side effects of herbal medicines.

38.   Unfortunately, the deposits that could prove such a drainage system existed have not been found.

39.   Volcano monitoring systems do exist.

40.   We do believe that governments are created to serve the people and that economic systems exist to minister to their wants.