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: Andromeda Ascendant:  The chance of a specific human DNA combination reoccurring is approximately _ one _ in three times ten to the fifteenth power .
Tyr Anasazi: Telemachus Rhade is n't just any human . He 's the product of sixteen centuries of selective breeding .
Dylan Hunt: Homo sapiens invictus have the same number of chromosomes as unmodified Homo sapiens .
Tyr Anasazi: Yes , but a smaller sampling . No Nietzschean carries the gene for astigmatism , acromegaly , arterial sclerosis . You combine that with extensive safeguards against mutation and what you 've got is ...
Dylan Hunt: And the odds are still in the trillions .
Tyr Anasazi: It 's a big universe .
Dylan Hunt: Yeah , and a bigger coincidence . You know , I do n't trust coincidences , especially ones named Rhade .
Tyr Anasazi: You should know by now that you can never trust any Nietzschean ... except me .

chance