Sentence:  “Marge Gets A Job” opens with the <WSD>foundation</WSD> of the Simpson house tilting perilously to one side, making the family homestead look like the suburban equivalent of the Leaning Tower Of Pisa. 
Meaning of the word marked with <WSD> tags:  (Q191360)  The lowest and supporting part or member of a wall, including the base course and footing courses; in a frame house, the whole substructure of masonry.