Question: what is the pterodactyls name in land before time
[{'answer': 'Petrie', 'provenance': [{'wikipedia_id': '7860324', 'title': 'List of The Land Before Time characters', 'start_paragraph_id': 1, 'start_character': 206, 'end_paragraph_id': 1, 'end_character': 212, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '7860324', 'title': 'List of The Land Before Time characters', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 470, 'bleu_score': 0.885598367304362, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13112355401104011323}, 'section': 'Section::::Abstract.'}]}]