This is the 7333rd most frequent Polish word.
karolina
"Karolina" is a Polish female given name equivalent to "Caroline" in English.
Here, 'Karolina' is being used as a proper noun, which is the name of a person.
Karolina poszła dzisiaj do kina.
Karolina went to the cinema today.
Here, 'Karolina' is used as a proper noun referring to the name of a place - Carolina, a U.S. state.
Czy byłaś w Karolinie w Stanach Zjednoczonych?
Have you been to Carolina in the United States?
In this sentence, 'Karolina' refers to an exemplary person and is still a proper noun used metaphorically.