Review the JSON code snippet given below and complete it by selecting the entity type and subtype for a prebuilt entity in a LUIS application: 
<pre>"documents": [{
"id": "1",
"entities": [{
"name": "last week",
"matches": [{
"entityTypeScore": 0.8,
"text": "last week",
"offset": 34,
"length": 9
}],
"type": "..........................",
"subType": ".........................."
}]
}],
</pre> 

Answer options:

A.DateTime
B.DateRange
C.Event
D.Location
E.Duration

Correct Answers: A and B 
Here is the completed code for reference: 
<pre>"documents": [{
"id": "1",
"entities": [{
"name": "last week",
"matches": [{
"entityTypeScore": 0.8,
"text": "last week",
"offset": 34,
"length": 9
}],
"type": "DateTime",
"subType": "DateRange"
}]
}],
</pre>Option A is correct. Named entity recognition provides the ability to recognize and identify items in the text. In this code snippet, the prebuilt entity type DateTime is used for categorization.
Option B is correct. While not all entity types have subtypes, the “DateTime” entity type offers sub-type DateRange, apart from other subtypes, that is correct for this example.
Option C is incorrect because the event entity type is used with a historic, naturally occurring or a social event.
Option D is incorrect because location entity type is used for a location such as a landmark or a geographical feature.
Option E is incorrect because duration subentity type is measures in units such as seconds.
Reference:
To learn more about DateTime prebuilt entity type in LUIS applications, use the link given below: 

https://docs.microsoft.com/en-us/azure/cognitive-services/luis/luis-reference-prebuilt-datetimev2?tabs=1-1%2C2-1%2C3-1%2C4-1%2C5-2%2C6-1