What does "They are walking through the Center to Fifth Avenue." mean in English for Spanish?

In English for Spanish, "They are walking through the Center to Fifth Avenue." means:

Ellos caminan por el centro hasta la 5ª Avenida.

Listen to "They are walking through the Center to Fifth Avenue.": (If you have an HTML5 enabled browser, you can listen to the native audio below)

This is a phrase that is used in the GamesForLanguage English for Spanish Language Game in the following scenes:

• English for Spanish 4, Level 2, Scene 2