Given a sentence containing a mention of substance use, consider the following categories:

A: This category refers to a patient who is currently using the substance or has used it within a short timeframe before the time of the sentence.

B: This category refers to a patient who has used the substance in the past, but there is no indication in the sentence whether they are still using it or not.

C: Patient explicitly denies using the substance or there is a discussion of the substance being present, but there is no indication that the patient has used or is using it.

D: Discussion about a substance or someone else's use of the substance, where there is no indication that the patient has used or is using it themselves.

Given the sentence “Long-standing heavy daily cannabis use” How would “cannabis” be classified? Make sure your entire response is wrapped in JSON format.
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