Question: When did the first call of duty come out?
Disambiguated questions and answers: question: When did the first call of duty come out in Microsoft Windows NA?
When did the first call of duty come out in Microsoft Windows EU?
When did the first call of duty come out in Mac OS X?
When did the first call of duty come out in N-Gage EU?
When did the first call of duty come out in N-Gage NA?
answer: October 29, 2003
November 7, 2003
May 2004
November 10, 2004
November 23, 2004
Natural Questions answer: 2003 (from the Wikipedia article "Call of Duty")