Based on the clue 'a horse or a person impatient at being held back i...', what is the answer?

What is associated with: a horse born december 31 1998 became a yearling on this date? Based on the clue 'a horse has got to learn to stand on his own four ...', what is the answer? Based on the clue 'a horse is a horse of course of course and no one ...', what is the answer? What is associated with: a horse named comanche survived this mans june 1876 last stand? Based on the clue 'a horse or a salamander but not a human or a snake', what is the answer? Based on the clue 'a horse racing enthusiast so called for his tracks...', what is the answer? Based on the clue 'a horse racing hall of fame is right across from t...', what is the answer? Based on the clue 'a horse with no name', what is the answer?