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: Dr. Spencer Reid:  Two 8 's instead of _ one _ could also be significant . I know in China the number 8 symbolizes prosperity . The more 8 's the better . As a matter of fact in Chungdu a telephone number consisting of all 8 's was recently sold for over a quarter million dollars

8