Assertion: pneumonia | /r/HasProperty | difficult to diagnose
Facets:
value: sometimes
type: TEMPORAL
Source sentences:
text: Sometimes pneumonia can be difficult to diagnose because the symptoms are so variable, and are often very similar to those seen in a cold or influenza.
text: Pneumonia can be difficult to diagnose because it shares many symptoms with other conditions, such as the common cold, bronchitis and asthma.
text: Pneumonia can be difficult to diagnose because it shares many symptoms with other conditions such as the common cold, bronchitis and asthma.