Question: what schizophrenic symptoms are decreased by drugs that selectively block the d2 dopamine receptor
[{'answer': 'psychotic', 'provenance': [{'wikipedia_id': '599614', 'title': 'Dopamine hypothesis of schizophrenia', 'start_paragraph_id': 1, 'start_character': 289, 'end_paragraph_id': 1, 'end_character': 298, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '599614', 'title': 'Dopamine hypothesis of schizophrenia', 'start_paragraph_id': 11, 'start_character': 0, 'end_paragraph_id': 11, 'end_character': 705, 'bleu_score': 0.979484453366057, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9360186410091577096}, 'section': 'Section::::Discussion.:Evidence for the dopamine hypothesis.\n'}]}]