Problem: He has presented lectures and conference of the College Art Association in Toronto ( 2007 ) and at the Subtle Technologies Conference in New York ( 2002 ) .
He has presented papers and the College Art Association conference in Toronto ( 2007 ) and at the Subtle Technologies Conference in New York ( 2002 ) .
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A: yes

Problem: The Empire Zinc Company was a subsidiary of the New Jersey Zinc Company .
The New Jersey Zinc Company was a subsidiary of Empire Zinc Company .
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A: no

Problem: Sixteenth Air Force inactivated and Third Air Force assumed the new role of Warfighting Headquarters for USAFE .
Third Air Force inactivated and 16th Air Force assumed the new role as Warfighting Headquarters for the USAFE .
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A:
no