Sentence: 'Belmont , CA Feb. 5 , 2001 -- A definitive new consumer digital camera report from Imerge Consulting Group LLC asserts that U.S. consumer digital camera sales cooled from 79.3 % unit growth in 1999 to 51.4 % in 2000 with 3.8 million in units sold , generating over $ 1.8 billion in street revenue .', Argument/Subject 1: 'digital', Argument/Subject 2: 'sale'
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