You will be shown an abstract from a biomedical research paper. Given this abstract, your task is to extract all unique entities of the following types: ["Chemical"].

Please return the output as a JSON object of the format: {"Chemical": ["Arsenic", ...]}. The keys should be entity types and values should be lists of extracted entities belonging to the corresponding type. If you cannot find entities belonging to a specific type, the value should be [].

Only output the JSON object and do not include any additional text.

Abstract:

Alcohol dependent patients have weak negative rather than strong positive implicit alcohol associations. RATIONALE: Alcohol dependence is characterised by motivational conflict (or ambivalence) in controlled cognitive processes, but it is unclear if ambivalence also exists within automatic cognitive processes, and if ambivalence operates between controlled and automatic processes. OBJECTIVE: To investigate ambivalence operating within and between controlled and automatic processes in alcohol dependence. METHOD: Alcohol-dependent patients who had recently completed inpatient alcohol detoxification (N = 47) and social drinking controls (N = 40) completed unipolar implicit association tests and self-report measures of alcohol approach and avoidance motivation and alcohol outcome expectancies. RESULTS: As predicted, both positive and negative alcohol outcome expectancies were stronger in alcohol-dependent patients compared to controls, indicative of ambivalence. Groups did not differ on implicit alcohol-positive associations, but alcohol-dependent participants had significantly weaker alcohol-negative associations than controls. Regression analyses revealed that implicit negative associations accounted for unique variance in group membership after controlling for alcohol outcome expectancies. CONCLUSIONS: Our findings demonstrate that alcohol dependent patients possess weak automatic alcohol-negative associations but not strong automatic alcohol-positive associations, and they suggest the presence of conflict between controlled and automatic processes with regard to negative alcohol cognitions.
{"Chemical": ["alcohol", "Alcohol"]}