Siriporn : How long have you known your best friend?
Weerayut : 10 years.
Siriporn : It’s too long. Can you give me a description of him?
Weerayut: He’s tall and thin. He has brown hair and white skin.
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Siriporn asked Weerayut how long had he known his best friend. Weerayut replied that he had known his best friend for ten years. Then, Siriporn asked Weerayut to give description of his best friend. Weerayut said that his best friend was tall and thin, moreover, he had brown hair and white skin.