# Detecting Reason of Hospitalisation

In this tutorial we will use the pipe `eds.reason` to :

- Identify spans that corresponds to the reason of hospitalisation

- Check if there are named entities overlapping with my span of 'reason of hospitalisation'

- Check for all named entities if they are tagged `is_reason`

```python

import edsnlp, edsnlp.pipes as eds

text = """COMPTE RENDU D'HOSPITALISATION du 11/07/2018 au 12/07/2018

MOTIF D'HOSPITALISATION

Monsieur Dupont Jean Michel, de sexe masculin, âgée de 39 ans, née le 23/11/1978,

a été hospitalisé du 11/08/2019 au 17/08/2019 pour attaque d'asthme.

ANTÉCÉDENTS

Antécédents médicaux :

Premier épisode d'asthme en mai 2018."""

nlp = edsnlp.blank("eds")

# Extraction d'entités nommées

nlp.add_pipe(

    eds.matcher(

        terms=dict(

            respiratoire=[

                "asthmatique",

                "asthme",

                "toux",

            ]

        ),

    ),

)

nlp.add_pipe(eds.normalizer())

nlp.add_pipe(eds.sections())

nlp.add_pipe(eds.reason(use_sections=True))

doc = nlp(text)

```

The pipe `reason` will add a key of spans called `reasons`. We check the first item in this list.

```python

# ↑ Omitted code above ↑

reason = doc.spans["reasons"][0]

reason

# Out: hospitalisé du 11/08/2019 au 17/08/2019 pour attaque d'asthme.

```

Naturally, all spans included the `reasons` key have the attribute `#!python reason._.is_reason == True`.

```python

# ↑ Omitted code above ↑

reason._.is_reason

# Out: True

```

<!-- no-check -->

```python

# ↑ Omitted code above ↑

for e in reason._.ents_reason:  # (1)

    print(

        "Entity:",

        e.text,

        "-- Label:",

        e.label_,

        "-- is_reason:",

        e._.is_reason,

    )

# Out: Entity: asthme -- Label: respiratoire -- is_reason: True

```

1. We check if the span include named entities, their labels and the attribute is_reason

We can verify that named entities that do not overlap with the spans of reason, have their attribute `#!python reason._.is_reason == False`:

```{ .python .no-check }

for e in doc.ents:

    print(e.start, e, e._.is_reason)

# Out: 42 asthme True

# Out: 54 asthme False

```