Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: (CNN) When three-year-old thoroughbred Patch takes to the starting gate at this year's Kentucky Derby Saturday, many people -- be it in the stands or watching on TV -- probably won't be aware that this is a very special horse. At the left-hand side of Patch's head is a dark hole -- about the size of a golf ball -- where his eye used to be. As a two-year-old, Patch developed an ulcer in his left eye that, despite the best possible medical care, didn't respond to treatment. Eventually, in June 2016, the colt had his eye removed after trainer Todd Pletcher decided nothing more could be done to save it.One-eyed Patch racing in Kentucky DerbyRace has purse of $2.4 million 
 Question:_, who was coincidentally given his name before losing an eye, is ranked as an outside -- but not impossible -- 30-1 shot along with three other horses.

Patch