Ответ:

grandpa Joe told Charlie that he had been working at this factory a few years ago. and somebody had stolen the recipe of chocolate. after that Willy Wonka had closed his factory. robots and umpa-lumpa worked in the factory instead of people.

Объяснение:

дедушка Джо работал у Вилли Вонки. кто-то украл рецепт его шоколада и Вилли Вонка закрыл фабрику от людей. вместо их там работали роботы и умпа-лумпа(маленькие человечки)