Fix "seperate" typo (#251)

docs/examples/entity_resolution.md

@@ -42,7 +42,7 @@ class Entity(BaseModel):
 class DocumentExtraction(BaseModel):
     entities: List[Entity] = Field(
         ...,
-        description="Body of the answer, each fact should be its seperate object with a body and a list of sources",
+        description="Body of the answer, each fact should be a separate object with a body and a list of sources",
     )
 ```