Task: Explanation
Input (English): Gillian Chung Yan-tung (born Chung Dik-san on 21 January 1981) is a Hong Kong singer and actress. She is a member of the Cantopop duo Twins, along with Charlene Choi. Question: What Hong Kong singer and actress was born Chung Dik-san and starred in The Twins Effect? Answer: Gillian Chung
Output (English): Gillian Chung Yantung born Chung Diksan on 21 January 1981 is a Hong Kong singer and actress.