Question: which of the following is most likely to be a limited resource on the floor of a tropical rainforest
[{'answer': 'sunlight', 'provenance': [{'wikipedia_id': '931370', 'title': 'Tropical rainforest', 'start_paragraph_id': 19, 'start_character': 65, 'end_paragraph_id': 19, 'end_character': 73, 'bleu_score': 1.0, 'section': 'Section::::Forest structure.:Forest floor.\n'}]}, {'provenance': [{'wikipedia_id': '931370', 'title': 'Tropical rainforest', 'start_paragraph_id': 19, 'start_character': 0, 'end_paragraph_id': 19, 'end_character': 841, 'bleu_score': 0.964583525681703, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2018321729572919446}, 'section': 'Section::::Forest structure.:Forest floor.\n'}]}]