"The woman likes soup."
Translation:Kobieta lubi zupę.
accusative=genitive in singular is something that happens to group of masculine nouns. We call them "masculine animated". (many people say Polish has 5 genders, masculine personal, masculine not personal animated, and masculine not animated).
the rule is that "animated" nouns are supposed to be nouns describing people and animals, but there are some other nouns that are in this group - this includes many food related nouns.