Definition: In this task, you will use your knowledge about language (and common sense) to determine what element the marked number refers to. The numbers are marked with two underlines around them, like: _ number _. Your answer should be chosen from the given text, and should not contain other words.
Input: Alfred Hitchcock - Host:  By the way , that last commercial was _ one _ which was sent to Russia as part of a cultural exchange . I do n't know what we received in return . We 're afraid to open it .

commercial