This is the 2269th most frequent Turkish word.
bazıları
"Some of them."
In this context, 'bazıları' is used as a pronoun to refer to an unspecified subset of people.
Bazıları sabah erken kalkmayı sever.
Some people like to wake up early in the morning.
Here, 'bazılarının' indicates possession and refers to a subset of people within a specific group, utilizing the genitive case.
Sınıfta bazılarının kitapları yoktu.
Some of them in the classroom didn't have their books.
'Bazılarının' refers to a subset of ideas, indicating they belong to a larger group and using the genitive case for clarification.