This is the 7324th most frequent Russian word.
гагарина
"Гагарина" is the genitive or accusative form of "Гагарин," referring to Yuri Gagarin, the first human in space, or something named after him.
Here, 'Гагарина' is used in the genitive case, referring to a street named after Yuri Gagarin.
Мы живем на улице Гагарина.
We live on Gagarin Street.
In this sentence, 'Гагарина' is used to denote possessive context (related to the statue of Gagarin).
Скульптуре Гагарина исполнилось 50 лет.
The statue of Gagarin turned 50 years old.
In this case, 'Гагарин' is in the instrumental case, referring to the astronaut Yuri Gagarin.