Based on prior knowledge, the relationship between the feature "Sex" and the target variable "coronary angiography showing heart disease" can be analyzed as follows:

Coronary artery disease (CAD) is a common type of heart disease that occurs when the blood vessels that supply blood to the heart become narrowed or blocked due to atherosclerosis. The presence of CAD can be determined through various diagnostic tests, including coronary angiography.

Although sex is known to be associated with the development and presentation of CAD, it is not a definitive determinant. Both males and females can develop CAD. However, males are generally known to have a higher risk of CAD compared to females, particularly at a younger age. Therefore, it is possible that the feature "Sex" can provide some information in predicting the presence of heart disease, but it is not the sole determinant.

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

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

Since the presence of heart disease can vary irrespective of sex, both categories ("M" and "F") are included in both target classes ("no" and "yes").