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What did Tom do at Kangkang's party?
He performed magic tricks.
Did he perform magic tricks ?
Yes, he did.
Tom
What did Sally do at Kangkang's party?
She danced.
Did she perform magic tricks?
No, she didn't. But Tom did.
Sally
Who sang at Kangkang's party?
Jane (did).
Did she sing a Chinese song or an English song ?
An English song.
Did she play the piano ?