=== "SIDA"
```python
text = "Patient atteint du VIH au stade SIDA."
doc = nlp(text)
spans = doc.spans["aids"]

spans
# Out: [VIH au stade SIDA]
```

=== "VIH"
```python
text = "Patient atteint du VIH."
doc = nlp(text)
spans = doc.spans["aids"]

spans
# Out: []
```

=== "Coinfection"
```python
text = "Il y a un VIH avec coinfection pneumocystose"
doc = nlp(text)
spans = doc.spans["aids"]

spans
# Out: [VIH]

span = spans[0]

span._.assigned
# Out: {'opportunist': [coinfection, pneumocystose]}
```

=== "VIH stade SIDA"
```python
text = "Présence d'un VIH stade C"
doc = nlp(text)
spans = doc.spans["aids"]

spans
# Out: [VIH]

span = spans[0]

span._.assigned
# Out: {'stage': [C]}
```