Problem: He has presented lectures and conference at the College Art Association in New York ( 2007 ) and at the Subtle Technologies Conference in Toronto ( 2002 ) .
He has presented papers and the College Art Association conference in New York ( 2007 ) and at the Subtle Technologies Conference in Toronto ( 2002 ) .
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A: no

Problem: They can be seen often long before they are heard .
They can be heard often long before they are seen .
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A: no

Problem: According to Jon Uren , marketing director of Warner Music Europe , the song also had '' early '' fantastic support across Europe .
According to Jon Uren , Marketing Director of Warner Music Europe , the song also had an '' early '' fantastic support across Europe .
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A:
yes