Question: what occurs at a full moon when the earth is directly between the moon and the sun
[{'answer': 'A lunar eclipse', 'provenance': [{'wikipedia_id': '18298', 'title': 'Lunar eclipse', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 15, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '18298', 'title': 'Lunar eclipse', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 377, 'bleu_score': 0.972407137066537, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1101652709944749162}, 'section': 'Section::::Abstract.'}]}]