CLEAN : FILE: Brazil's recession worst in country's history: GDP figures

The video provides an overview of train service lines, explaining their function and importance in transportation.

What is the main topic discussed in the text?

How long is the duration mentioned in the text?

What does the phrase 'Train service line' imply?

Can you explain the significance of the duration in relation to train services?

What additional information would you like to know about train services?