Study reveals that pollution to blame for cut in lifespans in north of country

The video is a repetitive welcome message to St. Petersburg, emphasizing the city's significance and inviting viewers to explore its offerings.

What is the phrase repeated throughout the text?

What is the duration of the first occurrence of the phrase?

How many times is the phrase 'Добро пожаловать в Санкт-Петербург!' mentioned?

What is the total duration of the last occurrence of the phrase?

At what timestamp does the phrase appear for the last time?