This is the 17744th most frequent Polish word.
zorganizowanej
"Organized" (feminine, singular, genitive or dative case in Polish).
The word "zorganizowanej" here is used as an adjective and functions as a part of the passive participle construction to describe the conference.
Spotkaliśmy się na konferencji zorganizowanej przez szkołę.
We met at a conference organized by the school.
In this sentence, "zorganizowanej" describes the group and emphasizes its organized nature.
To była wystawa zorganizowanej grupy artystów.
It was an exhibition by an organized group of artists.
Here, "zorganizowanej" is used attributively to characterize the type of crime, highlighting that it is organized.