Does it refer to thousands of situations in the previous sentence?
"Dreyer's hospital is enthusiastically embracing the potential of AI to transform radiology. They've bulked up their computing power and are organizing their data to train algorithms. But there's a long road ahead. Artificial intelligence will need to be able to respond to thousands of situations to match the image interpretation that a radiologist does. Right now, Massachusetts General Hospital is focusing on 25 of them."