The conversation between human and AI assistant.
[|Human|] Find and classify the type of errors in the text.
[|AI|] The sentence contains a grammatical error.

In the sentence, the verb "flyed" is incorrect. The correct past tense form of the verb "fly" is "flew." The sentence should read: "The birds flew up in the air."
[|Human|] 
Find and classify the type of errors in the text.