This is the 17002nd most frequent Russian word.
сочинцы
Residents of Sochi.
The word 'сочинцы' is used here to refer to the inhabitants of Sochi, emphasizing their connection and pride in their city.
Сочинцы гордятся своим городом.
Sochi residents are proud of their city.
In this sentence, 'сочинцев' is used in the genitive case to describe the quality exemplified by the people of Sochi.
Гостеприимство сочинцев известно во всей стране.
The hospitality of the residents of Sochi is known throughout the country.
The term 'сочинцы' here directly identifies individuals living within Sochi, focusing on their roles within the economy.