Based on prior knowledge, the RestingECG feature is likely to have a relationship with the presence of heart disease detected in coronary angiography. Let's analyze the relationship between the RestingECG feature and the target variable.

If the RestingECG value is 'Normal', it is less likely to indicate the presence of heart disease on coronary angiography. So, for the target class 'no', the possible values of RestingECG could include 'Normal'.

If the RestingECG value is 'ST' (ST-T wave abnormality) or 'LVH' (Left ventricular hypertrophy), it might indicate the presence of heart disease on coronary angiography. Thus, for the target class 'yes', the possible values of RestingECG may include 'ST' and 'LVH'.

Let's create a dictionary with these details:

```json
{
	"no": ["Normal"],
	"yes": ["ST", "LVH"]
}
```