Question: where does endocrine cells release their secretion to
[{'answer': 'the blood', 'provenance': [{'wikipedia_id': '1223446', 'title': 'Endocrine gland', 'start_paragraph_id': 1, 'start_character': 105, 'end_paragraph_id': 1, 'end_character': 114, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1223446', 'title': 'Endocrine gland', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 383, 'bleu_score': 0.9632870032952191, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5976373053840228067}, 'section': 'Section::::Abstract.'}]}]