Question: When did the yankees become a baseball team?
Disambiguated questions and answers: question: When did the yankees become a baseball team, originally called the Baltimore Orioles?
When did the yankees become a baseball team called the New York Highlanders?
When did the yankees become a baseball team called the New York Yankees?
answer: 1901
1903
1913
Natural Questions answer: after the 1902 season (from the Wikipedia article "History of the New York Yankees")