This is the 4176th most frequent Russian word.
собчак
In Russian, "Собчак" is a surname, most notably associated with Ksenia Sobchak, a public figure, or Anatoly Sobchak, a former politician.
In this sentence, Собчак refers to the surname of a public figure, demonstrating its usage as a proper noun.
Ксения Собчак известна своей деятельностью на телевидении.
Ksenia Sobchak is known for her activities on television.
Here, Собчака represents the possessive form of a surname, indicating the artist's work.
На выставке была картина Собчака, главного художника галереи.
At the exhibition, there was a painting by Sobchak, the main artist of the gallery.
In this example, Собчак is again used as a surname, but in the context of it symbolizing a broader artistic influence.