I guess somewhere in these threads someone questioned sometime ago whether Sarah Harding is the veterinarian's daughter or not.
Well in the movies it's not clear, Gerry Harding who was actually played by Gerald R. Molen (who was the producer of the movie) appeared only in the sick-triceratops-scene and in sequel The Lost World Sarah Harding is never related to him.
But there is a glimpse of that in the novels.
Dr. Harding plays not only a much bigger role in the book Jurassic Park but is also described as a specialist on birds and a former verterinarian in the zoo of San Francisco. He hoped to publish one time the first "Veterinarian Compendium: The diseases of Dinosaurs".
In the novel The Lost World, when they tried to vet the baby T-Rex, Kelly asked Sarah why she knows so much about anatomy. Sarah answered that she is used to inspect feces of animals where it's necessary to identify tiny pieces of bones and: "My father was a vet." Malcolm wondered and Sarah confirmed: "Yes, he was specialist on birds. In the zoo of San Francisco."
So following the novels continuity Sarah Harding is the daughter of Jurassic Park's vet.