has her horses participated in any race?
Yes, she trained racehorses
Florence Nagle
1966 became one of the first two women in the United Kingdom licensed to train racehorses. The first racehorse officially trained in Nagle's name was Mahwa, 
who is florence nagle? A trainer and breeder of racehorses, a breeder of pedigree dogs, and an active feminist. where was she born? Born in Fallowfield, Manchester. who was she born to? Sir William George Watson and his second wife Bessie did the dogs she bred belong to her? Yes, they were her dogs were they bred with other types of dogs too? UNANSWERABLE what kind of racehorses did she train and breed? Irish-bred colt Fernley where are such horses found mostly? In the United Kingdom what is the colour of these horses? UNANSWERABLE
wiki:4870406
Florence Nagle [SEP] Introduction
Described as "the Mrs. Pankhurst of British horse racing", Nagle trained her first racehorse in 1920, the Irish-bred colt Fernley. At that time women were forced to employ men to hold a Jockey Club trainers licence on their behalf, or to have licences in their husbands' names. Nagle worked peacefully to redress such injustices to her sex. She successfully challenged the well-established leading gentlemen's clubs of the racing and canine worlds over their gender inequality, and in 1966 became one of the first two women in the United Kingdom licensed to train racehorses. The first racehorse officially trained in Nagle's name was Mahwa, registered as being owned by her friend Miss Newton Deakin, with whom she jointly owned some of her dogs.