求翻译：Helen husband is Mark.Mark and Helen have got two children a son and a daughter.The son name is Andrew and the daughter name is Joyce.Joyce has got two children,a son and daughter.So Helen and Mark have got two grandchildren.Helen's grandchildren's name is Pam and her grandson's name is Dan.Andrew isn't married and he hasn'tgot any children. Pam and Dan like playing on the com-puter with their uncle.Andrew also likes playing football with his brother-in-law,Tom是什么意思？

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