The Grand High Witch then explains that elimination of children will be easily accomplished if all the witches set up in trade as sweetshop owners and places a potion in their stock that will turn anyone who consumes it into a mouse.
Elimination of children will be easily accomplished. This is what the Grand High Witch explains. All the witches set up in trade as sweetshop owners. All the witches places a potion in their stock. This potion in their stock will turn anyone. This anyone consumes it into a mouse.