21.   It took the Hartford police nearly two years to trace the origins of the heroin.

22.   It traces the origins of the cold war with visits to Berlin and Dresden in Germany, and to Prague.

23.   It was the bloodiest day in the history of the ATF, which traces its origins back to the first enforcers of Prohibition.

24.   Lasyone said he has tried to trace their origin, without success.

25.   Many Americans still envision their homeland as a nation dominated by whites who trace their origins to Europe.

26.   Many Columbia hospitals trace their origins to Humana, which was able to negotiate below-market rates in the past, Wolf said.

27.   Mayne Nickless, which traces its origins to the trucking and security industries, has in recent years embarked on an extensive diversification program into healthcare and telecommunications.

28.   Mayne Nickless traces its origins to the trucking and security industries.

29.   Ms. Wall traced the origins of the course to an interest in fostering public discourse on democracy.

30.   Others trace its origins to Little Italy.