Assertion: codeine's effect | /r/RelatedTo | the candor of interviewees
Facets:
value: by whom
type: OTHER
Source sentences:
text: It has been proposed [ by whom? ] that this effect may have been related to the candor of interviewees, who may have been inclined to answer more truthfully due to a reduction in the stigma associated with drug use.  
text: It has been proposed that this effect may have been related to the candor of interviewees, who may have been inclined to answer more truthfully due to a reduction in the stigma associated with drug use.