Based on prior knowledge, the sex of a patient might have some association with the presence of heart disease. It is known that men are generally more likely to have heart disease compared to women. Therefore, there might be a higher probability of coronary angiography showing heart disease for male patients.

Based on this analysis, the dictionary can be generated as follows:

```json
{
	"no": ["F"],
	"yes": ["M"]
}
```

Since men are more likely to have heart disease, the "yes" class includes males only. The "no" class includes females only, assuming there might be a few exceptions where females might have heart disease detected in their coronary angiography.