Question: how many seasons of the land before time are there
[{'answer': 'one', 'provenance': [{'wikipedia_id': '10635704', 'title': 'The Land Before Time (franchise)', 'start_paragraph_id': 12, 'start_character': 105, 'end_paragraph_id': 12, 'end_character': 108, 'bleu_score': 1.0, 'section': 'Section::::List of titles.:Television series.\n'}]}, {'provenance': [{'wikipedia_id': '10635704', 'title': 'The Land Before Time (franchise)', 'start_paragraph_id': 12, 'start_character': 0, 'end_paragraph_id': 12, 'end_character': 405, 'bleu_score': 0.742741859302204, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17556504404331317821}, 'section': 'Section::::List of titles.:Television series.\n'}]}]