Question: what was the apollo heat shield made of
[{'answer': 'plastic resin', 'provenance': [{'wikipedia_id': '233740', 'title': 'Heat shield', 'start_paragraph_id': 18, 'start_character': 59, 'end_paragraph_id': 18, 'end_character': 72, 'bleu_score': 1.0, 'section': 'Section::::Uses.:Spacecraft.\n'}]}, {'provenance': [{'wikipedia_id': '233740', 'title': 'Heat shield', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 237, 'bleu_score': 0.950578622812921, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2727136149240178588}, 'section': 'Section::::Uses.:Spacecraft.\n'}]}]