During the 2017 Academy Awards, Warren Beatty and Fae Dunaway read the wrong winner of the Best Picture award. He explained that the reason it had taken him so long to read the card was that he was looking at something that said Emma Stone had won. He showed it to Dunaway, who announced "La La Land." Beatty assured viewers that the error was unintentional and that he wasn't trying to be funny.

What is the meaning of unintentional in the above paragraph?

During the 2017 Academy Awards, Warren Beatty and Fae Dunaway read the wrong winner of the Best Picture award. He explained that the reason it had taken him so long to read the card was that he was looking at something that said Emma Stone had won. He showed it to Dunaway, who announced "La La Land." Beatty assured viewers that the error was unintentional and that he wasn't trying to be funny.

Which words from the paragraph can help the reader determine the meaning of unintentional?