Question: what does the adrenal gland produce that is necessary for the sympathetic nervous system to function
[{'answer': 'epinephrine'}, {'provenance': [{'wikipedia_id': '193753', 'title': 'Sympathetic nervous system', 'start_paragraph_id': 23, 'start_character': 0, 'end_paragraph_id': 23, 'end_character': 790, 'bleu_score': 0.9046391672996711, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17708381463350091167}, 'section': 'Section::::Function.\n'}]}, {'provenance': [{'wikipedia_id': '193753', 'title': 'Sympathetic nervous system', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17708381463350091167}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '471415', 'title': 'Adrenal medulla', 'section': 'Section::::Function.\n', 'start_paragraph_id': 11, 'end_paragraph_id': 11, 'meta': {'evidence_span': ['Adrenaline composes about 85% of the released catecholamines, and noradrenaline the other 15%. Notable effects of adrenaline and noradrenaline include increased heart rate and blood pressure', 'the catecholamines; epinephrine, norepinephrine, and dopamine. Because the ANS, specifically the sympathetic division, exerts direct control over the chromaffin cells the hormone release can occur rather quickly. In response to stressors such as exercise or imminent danger, medullary cells release the catecholamines adrenaline and noradrenaline into the blood. Adrenaline composes about 85% of the released catecholamines, and noradrenaline the other 15%. Notable effects of adrenaline and noradrenaline include increased heart rate and blood pressure, blood vessel constriction in the skin and gastrointestinal tract, smooth muscle', 'the catecholamines; epinephrine, norepinephrine, and dopamine. Because the ANS, specifically the sympathetic division, exerts direct control over the chromaffin cells the hormone release can occur rather quickly.']}}]}]