What does "Thank you, uncle Frank." mean in English for Spanish?

In English for Spanish, "Thank you, uncle Frank." means:

Gracias, tío Frank.

Listen to "Thank you, uncle Frank.": (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 3, Level 2, Scene 1
• English for Spanish 3, Level 2, Scene 12